web logs hack?

[rob@xxxxxxxxx]

We are using WebTrends log analyzer to analyze our Domino web logs.  At a 
certain time in the night our log files switch over  (I think they keep a 
days information in the logs).  Shortly after the switch over we get 
numerous new entries.  These entries appear in the analysis as the site 
doing the most referrals to our site.  I have no idea why a site featuring 
underclad females would be referring others to our website so often.  (Hey 
if these don't turn you on honey, you ought to look at these wiring 
harnesses?)  Doesn't happen every night, but enough to be a concern.  I 
want to make sure there's nothing imbedded on our site referring our 
visitors to their website.  I also want to make sure that they are not 
directly attacking our weblogs.  People tell me that's a common thing for 
hackers to do on the internet.  (These people really need to get a life.)

How do I start trying to figure this one out?

Rob Berendt
-- 
"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." 
Benjamin Franklin