This is the default url from where you can submit your website to Yandex.ru: http://webmaster.yandex.ru/addurl.xml.
The issue is that the captcha code has russian characters and you will most likely not be able to write them.
What you need to do is to create an account, see the “login” button from the right corner of the page. Click on it and then click on “sign up”.
Create an account and then login.
Now you should see below where is saying “Webmaster”, two links. Click on the one called “Add site”. Type the url of your website > add site.
Verify your ownership, you should upload some .txt file on your website (see there).
That’s pretty much it. This is actually the interface for adding websites for non russian speakers. Is very similar to Google Webmaster Tools.
For anything else, you should contact the Yandex.ru support at firstname.lastname@example.org.