Spam trend: PDF crashes, MP3 on rise

A sharp drop in PDF spam points to a centralized command and control structure over global spam, says Proofpoint. Also, MP3 spam is on the rise.

In mid-summer, you might have noticed a surge in spam in Adobe PDF documents. Proofpoint did. The data security company reports that in late July and early August, PDF spam grew to a dizzying one-quarter of all spam. (Considering that 90% of all mail that reaches corporate servers is spam, 25% represents a large number.)

To continue reading this article you must be a Bloomberg Professional Service Subscriber.