User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-184612-20141029234357

Vuze has done some decrypting of the current Paid DLC files. Note that none of this is confirmed by Capcom nor have they even discussed the Paid DLC yet.

http://mhvuze.tumblr.com/post/101205041568/mh4g-some-info-about-eshop-dlc-from-the-game-data