227041 Deceptive urls showing in goog

My site shows some deceptive urls against my site results in Google and all these urls end with [login to view URL] click they show as part of my site but after you click them then they go on some search sites. It looks like that some hacker has inserted some code inside my site which keeps generating such [login to view URL] keeps hunting them bt they keep generating more and more and i do not like this prectice and need an expert to find out what is happening. Please note that if you follow stream of all these urls through ftp then you do not find them anywhee as they are not part of my site. Programmer who really knows what i am talking about should only bid otherwise it is not hit and trial job to perform. I can send some live examples through PMB for your better understanding if you wish.