I reckon it`s real. It`s got a very convincing shadow which is in keeping with other shadows in the picture (depth, direction etc) and if you look at the focal point of the picture (the badger) that`s in keeping with the focus of the trees.
I have some lovely photos of badgers taken near us in the countryside. They were taken in the evening when we often see them on the move but if they see or sense you they are gone.