Its always interesting to see how big brands mess up their sites in the SERPs, potentially causing SEO headaches.
I often spot loads of these in the wild, but from now on, am going to start documenting them under my LOL category.
Lets start by clicking: https://www.google.co.uk/search?q=site%3A188.8.131.52
Basically google is indexing the site via the IP.
The best option is to figure out how this content got leaked, and start blocking, redirecting and cleaning up. I am sure you will start seeing a bit of positivity in your search rankings.
Tip: Get 301s from the IP set up as wildcards to the domain (the correct version of the domain if you are using www.)
Rishi Lakhani is an independent Online Marketing Consultant specialising in SEO, PPC, Affiliate Marketing and Social Media. Explicitly.Me is his Blog. Google Profile