It's a book called Les Guerriers de l'Hiver (Winter Warriors) by Olivier Norek who was a cop before he started writing fiction.
Apparently his first book was ok. It was about humanising migrants who were stuck at the French border, so I guess he's not a literal racist but rather "rabid liberal sides with nazis when talking WW2"
Nonetheless the book is just glorifying the Finnish and depicting Soviets (well, he calls them "Russians" all the time lmao) as a zombie horde. It's all about how the "White Death" guy was a hero. I randomly opened a page and I kid you not first thing I read was "-Will we be free after that?" "-Well as free as one can be in Russia" 
Very cool mister anti-racism cop, and thank you to my fellow social democrats for thinking I wanted to read the most clownish anti-soviet propaganda by some lib who's got zero background in History
Images, I'm unsure of. There are possibly a few examples out there.
As far as words go, or direction given to the propagandists by the head propagandist (Goebbels of course), there's a lot of scholarship on the direction of the Nazi propaganda, specifically anti-USSR propaganda, after the Germans were defeated at Stalingrad. In one of the orders or whatever "Bolshevist hordes" are mentioned as a subject to focus on. Also "Asiatic hordes." Asiatic being the term the Nazis liked to use for Russians
(Speculation) I feel like creating images of giant, "Bolshevist hordes" might have been problematic in the wake of the war-changing loss. If you're the Nazi artists you wanna depict the Germans as having the overwhelming odds in battle. Not like "smol bean" Nazi divisions getting stomped by "hordes" of Soviets. Even if your intent is to say "look at the vast mindless army!" you're still crediting your enemy with having a vast army. That's my only thought as to why there aren't that many images and the rhetoric seems to been on paper. Although I don't have a mental encyclopedia of Nazi propaganda posters... it's very possible someone did draw something depicting basically zombies wandering towards Germany or something with Stalin in the back mind controlling them (or whatever the "infinite depths" of Nazi imaginations could come up with)
I think by the time they started going with that angle, the situation had reached a point where they couldn't possibly deny the size of the Russian army, so they had to spin it as best they could. "It doesn't matter how strong they are, we'll win because we're smarter!"