PDF spam--junk e-mail with its message attached as a PDF file to get past spam filters--poses no security risk, says Adobe Systems.

Asked if PDF spam can embed malicious software, Erick Lee, a security engineer at Adobe, wrote in an e-mail on Wednesday that "PDF is no more able to embed malware on an unsuspecting user's system than any other typical e-mail attachment."

Over the last two months, security vendors have seen a spike in spam embedded within PDF documents. Last week, it was used in a large-scale "pump and dump" scam that reportedly caused a huge spike in spam levels and in the share price of the company highlighted in the PDF spam campaign.

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Adobe, PDF, Spam, Junk email, Email, PDF Spam, Intrusion