It's Korean language; I ran some of it through Google and the posts I translated were related to online gambling and Korean baseball leagues.
I'm sure the crack IT staff is on the case as it has been for decades.
I think it was just a Korean bond fund investor making a series of posts about conservative, more conservative, and very conservative bond funds with fifteen different ways of measuring risk.
It was most likely a post about total return investing vs. income investing.
But on a more serious note, this forum used to get hammered regularly with spam posts. First time in a while something like this has slipped through. While it is annoying, I'll give M* some credit, this is nothing compared to what it used to be.