Have you received any customer email like this one? Is it spam?

At midnight I was sent an email from Amazon’s customer messaging, which read only this one word:

gochugaru

What do I do with that (apart from clicking on ‘report email’) - reply to buyer?

Who would send me this, why? Chinese trying to get my name to sell a list of names in Asia (haven’t heard of this for a while, come to think of it)?..
Anyone got that too?