I do not know too much about how teh internets work, but it would really surprise me if Pando Networks did not own any subdomain!
So since the download link starts with gcs-icdn.pandonetworks.com, it should be completely legit. If nttgame were fake, they would then either have to hack Pando Networks, or they would have to fool them. And what exactly could anyone try to gain from all this? They would have to be mad.
But yeah, there are few weird things; such as the file symbol.bmp inside the symbol_eu folder. Comparing it to the equivalent file from USKO, it looks like someone has edited it in paint.
There's also a weird movie in the KnightMovie folder, something about Nuslam Klasras, which according to a google search has something to do with a disabled quest.