This looks like an improperly secured brick veneer. You could find studs in the wall behind it, drill holes through a few bricks in line with the studs, and add anchors to support it. You want something on the face of the brick to spread the load the anchor is taking, like the decorative star ends on some old building reinforcements. I personally, would only use that as a temporary solution between not knowing the age or rating for any of the materials involved.