I'm not a Historian, but I can read German. The document is a hunting permit. Page 2 explains how to carry and use your gun. Page 3 lists the different kinds of animals you can hunt during which time of the year. Page 4 lists more general restrictions and lists the price of the permit.

That hunting-permission says "native/resident one year annual hunting permission". Was the Ukraine ever part of the German Empire or is your ukrainian grandfather not a Ukrainian?

Follow up: I thought that the hunger plan called for starvation of the eastern slavs, how did a ukrainian get a hunter's license?