Retail spammers are using new URL shortening to fool existing security systems, say researchers.
Security vendor Symantec has spotted a new round of spam emails believed to be connected to the Cutwail botnet.
According to Symantec Hosted Services senior software engineer Nicholas Johnston, the spam operation begins by directing the user to a link which has been concealed by the use of a URL-shortening service.
The company said the sites all advertise holiday shopping and gift ideas.
This latest attack, however, combines the two techniques to add an additional layer of insulation between the spammer and the actual spam email.
"Redirecting users in this way shows that spammers are going to considerable lengths to hide the addresses of their actual spam sites, and actively trying to make detection by anti-spam companies more difficult," said Johnston.
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