Spammers have changed tactics and are starting to use the PDF format to send out their spam. An analysis shows that it was launched by a botnet that spanned 167 countries.
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9026840&pageNumber=1
[Editor's Note (Valle): Now that anti-spam companies that learned how to identify and stop image spam fairly well, the spammers have found a new technique to get their messages into people's email boxes. Yahoo is usually very good at blocking out spam but recently I have been getting 3-4 spam messages a day for the last few weeks and surprise, surprise- they all had PDF attachments.
I talked with the IronPort folks and they said they were all over this and their customers would not be affected by this PDF spam.
