Well, as these guys are scammers, they propbably use false data for their doamin contacts....
So, here is how it goes....
Get the domain data as described in the post above... try to contact them.. of cause this will not work...
then write to the domainhost and complain about the domain not having correct data... most domainhosts have special forms for that.. check the policies etc....
That of cause will also not really help... as there are to many ways to fake domain entries after a complaint again...
Now go to traceroute.org and check the domain.... check the last few IPs to get the Server host..... you can contact them about copyright infigment... basically all server hosts are very strict about those infrigments. they will contact the owner of the site and remove the site if needed..... but to get it done best, a lawyer should do all this.. also mention the false domain info etc...
But all this also depends in what country the server is and where you are located.... at the end it is very hard to get such content removed from the net, unless you really know how to get it done...
BTW... I already checked it for you..... the website is hostd by
www.ptisp.org...... unfortuntely I can't read that language... so you are on your own from there....