Seems to have been a huge leak from a user from reddit.(whom has since deleted his account)
Also on Gaf: http://www.neogaf.com/forum/showthread.php?t=1343614&page=1 (thanks wyrdness)
Keep in mind, these documents are from an era where the device was called the NX still, so specs and features could have easily been added, removed, improved or worsened.
Some takeaways from this :
OS uses 750MB Ram. 3.25GB Usable by developers.
Dev units did have 64GB Storage, Retail has 32GB
Unreal 4: The NX version will include these latest revisions, and will be optimized so that you can create games while taking full advantage of the hardware performance. Note that there may be restrictions on available functionality, depending on NX performance.
The device does not have a built-in mic. A headset must be connected to this port to use in-game chat or similar features.
Game Cards only go up to 32GB at the moment, Capacity variations include 1 GB, 2 GB, 4 GB, 8 GB, 16 GB, and 32 GB.
Pro Controller doesn't have IR, but does have accelerometers and gryos.
Pro Controller has 2 Linear resonant actuators, which allow HD rumble. This is probably the main reason why it costs so much.
SoC equivalent to Tegra X1 from NVIDIA.
Battery charges last for approximately three hours (the same as for the Nintendo 3DS).
NX specifications will not use region locks. As a result, it will be possible to play any downloadable software on any NX. So, no worries about downloadable content based off of this rumor. It's up to the developer to allow downloads from any region.