Tuesday, August 7th, 2007 at 2:00pm

Spammers using Adobe .PDF attachments at full force

Posted by Jordan Erickson

http://www.channelregister.co.uk/2007/07/23/spammers_switch_to_pdf/ –

A lot of you might have experienced a rise in random e-mail spam containing Adobe’s Portable Document Format (PDF) document attachments. It seems as though attaching a spam message via a .PDF document is the latest trend in circumventing anti-spam servers and client utilities, since very few of them currently employ countermeasures against these types of attacks.

From the article:

“The spammers are doing the old cat-and-mouse game,” said Guy Roberts, senior research manager for anti-spam at McAfee. “Vendors have caught up to spammers and detection is pretty good for image spam, so (the spammers) are changing tactics in order to get their message across.”

“From a spammers point of view, the strength of PDF is that many companies require that their email systems allow the documents to be passed to the user, said Menashe Eliezer, director of anti-spam research for security firm CommTouch. Because PDFs are ubiquitous in the business world, such attachments are more likely to reach the users, he said.”

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