With the DNC actions and the trickery and deceit they used to get Clinton past Sanders, no further propaganda was necessary to demolish HC. If some imaginary russian PR agency had been tasked with invention stories that put HC into a bad light, they couldn't possibly come up with such a shit. They would've been told "come on guys, it has to be at least borderline believable".
This reminds of me of my favorite quote. I believe it was Tom Clancy (or at least I saw it attributed to him) who said something to the effect of, "the difference between the truth and fiction is that fiction has to make sense."