There are a couple ways to fix a pull. This is the easiest I've found for myself
1 - Pass a piece of fine and waxed thread through the loop of the pull (you may need to put it on a needle first, if the loop is small).
2 - Insert the needle into the hole that the pull created, or at least get as close as possible to the center point between the two ends of the pull loop.
3 - With the needle halfway through, pass both ends of the thread through the eye of the needle (or add the remaining end, in the same direction, if one is already threaded).
4 - Draw the needle the rest of the way through. Once the hole of the needle is through, use the thread to draw rather than the needle, so that one end doesn't slip back through the fabric.
5 - Once the thread comes up against the loop of the pull, gently draw it through to the back side.
6 - Let go of one end of the thread and draw on the other to take it out of the now reversed pull.
You can reverse step 2 & 3, but the way listed lets you use shorter thread so there is less friction, though that may only matter with certain fabrics. If the fabric has a backing, you'll need to pass the needle back to the front some distance away from the pull that is further away than the pull loop is long. If that's the case, waxing the thread can help make sure that you don't pull the loop even more out the back than it was originally pulled out the front. Go slow and gentle.
Good info, thanks kindly!
Judging by the tumbleweeds in my inbox, I guess it was a smart pass haha.