Car leaking under passenger side?

So we have 02 Ford Expedition Eddie Bauer. And there has been a leak above the front right tire and we have no clue what it may be. Its leaking a reddish brown fluid around the wheel well area. If anyone could give us any clue on what it may be please tell us.

First, check the brake fluid, and transmission fluid. If they are not leaking, then it may be the shock/strut leaking (this is rare, but it happened to me once).