Beineld

Are enemy characters within an A2 attack considered to be "targeted" by an attack? Example: Thor, and ally Heimdal are both within 1 range of an enemy Dr Strange. Thor uses God of Thunder, which does not choose a target enemy for the attack but instead measures A2, then targets each enemy individually for the attack afterward. Assuming damage lands on Dr Strange from this attack, can Thor and Heimdal use the tactics card Trip Up on Dr Strange? Thanks!