I started my research by putting on Netflix and watching a film that I've had on my list for some time now "The Babadook"
Now for a little background "The Babadook" is an Australian horror/thriller in which a hardworking widow unknowingly incurs the wrath of a malevolent demon known only as "The Babadook". Throughout the film we see out hero Amelia try, and occasionally fail to keep herself from losing her mind under the stress of being a single working mother as well as the target of supernatural attacks. The story alone is really well designed but where the movie really succeeded, at least in my opinion, was in cultivating a sense of helplessness especially through it's cinematography.
First of all the movie shows us outright the face of our shadowy assailant:
If you're interested in watching the film you can find it on Netflix, or through a couple of risky stream sites online. I'd advise paying special attention to the way the babadook forces a divide between the mother and her child. There are a lot of really well thought out parallels between the Mother and the Monster that I caught, and I definitely think It's a film that requires multiple viewings to fully appreciate.