You get just one chance to pull this off during the chapter. When you encounter the area with the spike trap there will be another room just ahead with two haunted and a spike trap in the middle of the room.
If you have a bottle just simply throw it on the trap and the haunted will go there and the trophy will pop. If not then you need to lure them by getting the attention of both and walking over the trap. The second method requires more precise timing but you can retry via the pause menu if you screw it up.