My host runs Analog every day, and once in a while I take a peek at the reports.
I found the following mysterious file as having had one hit:
http://www.kitty-carroll.org/lynjixswmysmp0.html
There are four others, with identical URIs except for the digit, 1 through 4 inclusive.
WP, I was reasonably sure, doesn't produce this sort of static page. All these links lead back to the main page (index.php). Going back through the monthly report, I found a few others, plus two which allegedly linked to WMA files, none of which I have on the site, and which still bring up index.php. Where in the world are these coming from? (I have a second WP blog, at wendex.net; it has no such files.)