Do Not Ever Open
Unexplained events begin to occur inside Karen’s apartment when she receives a mysterious envelope in the mail with no return address.
Starring Thais Castro, Deuza de Sá, Edson Salvioli, Emanuel Sá, Rafael Zanesco
Watch "Do Not Ever Open" from streaming services Tubi TV, Amazon released in 2016. It's a horror and thriller movie, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of movie.