At the end of mission eight, you need to destroy Bohm's plane. First, you need to make sure that you take a bolt-action rifle. Most rifles in the game, including the starting one are bolt-action. Now, allow the plane to take off and eventually he will circle around. Aim and fire at the missile at the bottom of the plane, hitting this should cause a cinematic as well as your achievement / trophy to pop.
Here is a video guide with English commentary!
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUJ_Be1KEgJ2...