Spamjadoo became first to block PDF based spam
(An Indian company`s achievement to block spam without content filtering)

In late June 2007, spammers engaged in new spam campaigns in which they
embedded messages within PDF documents. By using PDF files, spammers
attempted to bypass text and image scanning engines in email security
products. Because these PDF attacks utilized existing botnets to generate
similar traffic patterns on the Internet as more traditional spam attacks.
Spamjadoo Greylist antispam mode is now integrated with PDF spam block
engine and has the capability to block such spam without even analyzing the
content of it. Thanks to ESP technology for achieving this kind of blocking
first time in the world.

Spamjadoo antispam research team detected at least two forms of the PDF spam
campaigns: 1) full documents resembling investment analyst reports of
reputable firms, and 2) image-only PDF files resembling the image spam
attacks introduced in 2006. Spamjadoo ESP technology allows blocking PDF
spam without analyzing the content, and still ensuring ZERO chance of
lossing the desired and important email.