Who's ad server is this?
 

64.111.196.117

Trying to find out what company uses that server as a redirect for marketing.

http://whois.domaintools.com/64.111.196.117

OrgName: ISPrime, Inc.
OrgID: IPRM
Address: 25 Broadway
Address: 6th Floor, Suite #2
City: New York
StateProv: NY
PostalCode: 10004-1086
Country: US

ReferralServer: rwhois://rwhois.isprime.net:4321/

NetRange: 64.111.192.0 - 64.111.223.255
CIDR: 64.111.192.0/19
NetName: ISPRIME-ARIN-2
NetHandle: NET-64-111-192-0-1
Parent: NET-64-0-0-0-0
NetType: Direct Allocation
NameServer: NS.ISPRIME.COM
NameServer: NS2.ISPRIME.COM
Comment:
RegDate: 2005-03-09
Updated: 2005-11-09

Yeah I figured out that it was hosted at ISprime but can't get anything further then that. Reverse DNS turns nothing :(

Have you tried checking the domains the ads are being served from?
WG

Its interesting that the IP address has an alexa traffic rank of 17K

All I can find on them is that its a redirect for Shopbrite.com ads. Not sure who Shopbrite is but I'm still looking. I am guessing its some adware company.

It may be a company called "PeakClick"