From the FvW rulebook for Invisible "This object is invisible and cannot be targeted (there is no LoS to it). However, it can be affected by attacks, spells, or abilities which do not target it directly, such as zone attacks and spells. It can also be attacked by damage barriers and counterstrikes. As long as it has the Invisible trait, it also gains the est and Elusive traits."
For Force Pull "The Forcemaster can use telekinesis to pull creatures towards her. Force Pull is a quick force spell. It costs 1 mana to cast, and targets a creature 1-2 zones away."
Since you can't target it, you can't use Force Pull on it.