As part of making both the poster and the magazine editing pictures is key to making the final product.
Original Photograph
A filter is used to brighten colours. Each cast member has a distinct colour which is shown in their clothing. Which will help the audience familiarise with the characters in the film.
The photograph has been desaturated, which reflects the mood of the story line which is not so pleasant.
Instead of desaturating all the colour, a red/brown filter is used. In one of my research examples this has been used and it again is used to set a mood. 

