Praetor Advantage - Heuristic analysis and common spammer tricks and tactics

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Heuristic Analysis Tests For Distinctive Tricks Used By Spammers

Spammers use a multitude of common tricks that normal personal messages would never contain. These tricks are detectable clues to identifying spam email.

Praetor employs heuristic analysis to detect these spammer tricks from messages that its Bayesian filter classified as "uncertain". Training Praetor with these "uncertain" messages promotes easy detection of these spammer tactics.

A short list of common tricks in HTML messages include:

		SPAMMER TRICK	DESCRIPTION
		Tiny Text	A very small font is chosen in an attempt to hide text and mislead spam filters.
		Invisible Ink	A font color very similar to the background color is chosen to hide text within a message. This is an attempt to confuse spam filters and let the message be delivered to the users' mailbox.
		Obfuscated URLs	Explicit IP addresses and encoded domains are used deliberately to make it difficult for the user to decipher.
		Embedded Comments	Spammers use comments placed within a message's HTML code to confuse Bayesian filters with new words not seen before, or excerpts from news articles.

These tricks are used by spammers to bypass spam filters. Praetor's heuristic analysis adds another layer to detect spam in cases where the Bayesian filter is unsure.

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