This is weird. It superficially seems to be a publish ping triggered peek-back system which tracks posts containing some or a few of the words it covers, and upon finding them, sends track-back pings to the post, one trackback for every covered word found. Does this read trackback spam to you, or is it a usefulm but perhaps misconfigured service? I'm leaning toward the former, but I'm not sure how fully automated or intended-permanent the setup is yet.
I hold a firm belief about trackback notification being a tool reserved for notifying about human commentary. Breaking that is littering the blog world, and I believe this breaks that convention, quite severely.