These creepers would be creepers that have been tainted by Deploro and they work similarly to endermen. They don't explode when you get close to them, rather, they explode when you look at them (and you are within 2-3 blocks).
When they explode, they explode in a bunch of Purple particles and they teleport you in any direction (excluding into a block). Now, if you're unlucky enough to have been teleported up, you had better be wearing armor, because the creepers teleport you the exact amount of blocks away that would kill someone without armor (20 hearts of damage).