Here's a good tutorial on this topic: https://www.youtube.com/watch?v=A0O37yrzFWA
This pin for sure will help https://www.pinterest.com/pin/557109416398905847/
If it's leather or vinyl, I've successfully used 3M leather repair kits.
what material is your couch?
Cloth upholstery. Wonder about using one of the shavers designed to remove pills from sweaters.
If fabric, use a large needle and thread them pulls back into the couch! If leather, use Modge Podge to stick back the pull and renovating shoe polish to blend them in to existing couch.