Hi malware fighters,
Best to give an example with an obfuscated iFrame attack:
See attached pics...
I won't give the general way this attack could be performed for obvious reasons,
we are malware fighters here, alas you still have to count the redirects..
and there are some adware blockers they may interfere to perform it...
So under all circumstances protect with NS and RP in your mozilla browser of choice,
that is the best advice I can give you and rely on the avast shields protection,
see:
http://forum.avast.com/index.php?topic=45223.0polonus