Somehow I fear we've stumbled onto Randall's Secret Stash...
Nah, no raptors, it can't be XKCD's.
The main host page seems to be static and from a random search on a dictionary. Right now it won't change from Mangroves softeners mishap!
The NSFW page does say
Index of Pictures
This is an automatic aggregation of every image posted to #xkcd (plus a few other very public channels) tagged "NSFW", as of the last running of the grep. It is not updated.
So it might be from #xkcd or from other channels. It seems to be an autogenned site:
Other aram.xkcd.com directories:
http://aram.xkcd.com/emad_images/ (random memes?)
http://aram.xkcd.com/temp/ (text files and at least one zoomed in xkcd comic)
Sidenote:
http://aram.xkcd.com/temp/cakes.txtSeems to be a column of numbers with ASCII drawn penises of varying sizes next to them. I can see no connection between the penii and the numbers, which thoroughly confuses me.
http://aram.xkcd.com/nsfw_images/nsfw.txt seems to be textlinks to nsfw images
http://aram.xkcd.com/irc_images/ seems to be links to random images (might be some nsfw, not sure)