For this trophy, you'll need the Bad Omen status effect, which you can get by killing a Pillager Captain (I have a guide for this one here:
Solution for I've got a bad feeling about this In Minecraft: PlayStation 4 Edition)
With the Bad Omen status effect, all you need to do now is enter any Village that you find. Once there, you should see a purple bar appear at the top of your screen which says "Raid". This means you have successfully triggered the Pillager Raid, and the trophy should pop.