Yep pretty much normal. I see the underside of your car has a layer of salt on it, so I assume you live in an area that gets snow and roads salted. Salt is highly corrosive, and with it comes rust. That is only surface rust and nothing to be concerned about at this point. There are things you can do to slow down the rusting, like Krown or Fluid Film undercoating. Avoid rubber type undercoatings like Ziebart.