This papercraft is S.A.F.S. (Super Armored Fighting Suit) Snowman, a Ma.k series suit from the Maschinen Krieger ZbV 3000 (SF3D) sci-fi universe, the paper model is created by papercraftia.
You can download this gundam papercraft here: Maschinen Krieger ZbV 3000 - S.A.F.S. Snowman Free Papercraft Download [Box] [Gavitex]