Cisco Security Intelligence Operations has detected significant activity related to spam e-mail messages that claim to contain a Canada Post package delivery failure notification. The text in the e-mail message instructs the recipient to follow a link to view the details. However, the link directs the user to a malicious .pif file that, when executed, attempts to infect the system with malicious code.
E-mail messages that are related to this threat (RuleID4229 and RuleID4229KVR) may contain any of the following files:
The pdf_trk_invoice.pif file in the pdf_trk_invoice.zip attachment has a file size of 167,936 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0xCD0B183144E335E642BE0A5D0AF71BEF
The pdf_trk_invoice.scr file in the pdf_trk_invoice.zip attachment has a file size of 50,688 bytes and an MD5 checksum with the following string: 0x5F2A7D126EA1BCA68F12982A44A952F5
A variant of the pdf_trk_invoice.scr file in the shipment_capost_invoice.zip attachment has a file size of 101,376 bytes. The MD5 checksum is the following string: 0xE94A58C3AA3E770609F899C35524B819
A second variant of the pdf_trk_invoice.scr file in the shipment_capost_invoice.zip attachment has a file size of 105,472 bytes. The MD5 checksum is the following string: 0x2F7C7C3A936D06CDF43330758C868605
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: Missed package delivery!
We attempted to deliver your item on June 5, 2012 , 09:17 AM.
The delivery attempt failed because nobody was present at the shipping address, so this notification has been automatically sent.
You may arrange redelivery by visiting the nearest Canada Post office with the printed shipping inboice mentioned below.
If the package is not scheduled for redelivery or picked up within 48 hours, it will be returned to the sender.
TRACKING Number: LP289849226CA
Expected Delivery Date: June 5, 2012
Class: Package Services
Service(s): Delivery Confirmation
Status: eNotification sent
To check on the delivery status of your mailing or arrange redelivery please visit the following
To download the shipping invoice, visit the following link:
2012 Canada Post Corporation
Cisco Security Intelligence Operations analysts examine real-world e-mail traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global e-mail security threats and trends. Cisco will continue to monitor this threat and automatically adapt IronPort systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.
Cisco IronPort Virus Outbreak Filters protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. E-mail that is managed by Cisco and end users who are protected by Cisco IronPort web security appliances will not be impacted by these attacks. Cisco IronPort appliances are automatically updated to prevent both spam e-mail and hostile web URLs from being passed to the end user.
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