Malicious advertising hits Amazon, YouTube and Yahoo, Cisco says

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Malicious advertisements have popped up on websites such as YouTube, Amazon and Yahoo, part of a sophisticated campaign to spread malware, Cisco said Monday.

When encountered, the malicious advertisements cause a person to be redirected to a different website, which triggers a download based on whether the computer is running Windows or Apple’s OS X, wrote Armin Pelkmann, a threat researcher.

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