Spam Spam the Underpants Man

Has anyone else been getting weird spam recently? With text like:

zig-zags of the embankment lights reflected in the water. When Ivan clambered damply up the steps at the place where he had left his clothes in the care of the bearded man, not only his clothes but their venerable guardian had apparently been spirited away. On the very spot where the heap of clothes had been there was now a pair of check underpants, a

underpants--which obstinately refused to look like trousers. Ivan plunged into a maze of sidestreets round the Arbat and began to sidle along the walls, blinking fearfully, glancing round, occasionally hiding in doorways, avoiding crossroads with traffic lights and the elegant porticos of embassy mansions. It was an old two-storied house, painted cream, that stood on the ring boulevard behind a ragged garden, fenced off from the pavement.

I accidentally opened one of the messages and saw that all the image attachments spelled out something rather typically spammish. Can anyone explain what the point of this is?