Looks like a galdr or a rotas cros if some kind.
And there is good and bad versions.
I supose there was no info on the sender of it.
So I supose it's a "black" usage of it.
And they tend to be used so the one theyr atended for to se it.
Il take another look at it. And the versions I have.
When there is a 'good' rotas cros. It is also usaly a how to best use it description for the one. And explaining what it do.
So my opinion is that it's a 'curs'
a reversing ritual and also a own making of a protection rotas or galdr use. Or another thing that fits you. Would be recomended.
These sides are on Swedish so use a google translater or somthing.