Emergency services were forced to use a wheelchair in order to remove her from the shopping centre, local news reports.
She was then taken to hospital in the city in Brazil's northeastern state of Piaui.
Annabelle: Creation is the latest in the The Conjuring horror franchise. The film, starring Lord of the Rings actress Miranda Otto and Without A Trace's Anthony LaPaglia, is a prequel to the 2014 film Annabelle.
It tells the tale of how the murderous doll Annabelle came to be possessed by a demon.
The Brazilian woman had reportedly started acting strangely at the scariest moment of the film, according to an audio message being shared with the video on social networking sites.
She says: "It was at the moment when the devil appeared.
"When the film ended, we went to pay the car park and she started hitting herself with punches to her own head, and threw herself on the floor.
"Other people in the shopping centre got together to try to control her, I became really scared."
A member of staff at the shopping centre told Brazil's UOL website: "We haven't managed to find out exactly what happened or what caused this behaviour.
"What we know is that she was really very nervous and couldn't herself explain what had happened."