MS Office Security Watch

The Excel, PDF, and RAR archived spam are just next generation anti anti-spam techniques spammers discovered they can use to avoid detection. This catch-me-if-you-can game is eerily similar to the development of anti anti-virus …
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Escalation

Simple/Amateur: These spammers craft PDF documents using ordinary tools like Microsoft Word and use the same PDF for the entire spam run. Professional: More sophisticated spammers who attach a different PDF to every spam. …
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Spammers use modified PDF files to bypass detection

Bulk e-mail using attachments in the Portable Document Format (PDF) has begun to decline just a month after it first appeared, and spammers are moving on …

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Spam goes back to the future

Spammers are changing tactics! Beware of pdf and xls spam.
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Recent change in Stock-Spam Tactics %28PDF and excel%29