Don't even try moving away from where you're standing, just focus on the coming of the first of three wolves. Get into aiming mode. Start stretching the bowstring as soon as you notice Lara's breathing has become quicker (screenshot).
Luckily, killing wolves in quite easy because the game will slow down for a few seconds, giving you plenty of time to make a successful shot (screenshot; reward: 10 XP). Do the same with two other wolves (reward: 20 XP + 100 XP for completing the objective).