Hello and Welcome. The dents I wouldn't say is normal, as in not every Russia. Has them. I have seen some pics of ones that have them though. I'm not sure what you causes them. Hopefully some one will know.
I see a little redness in the dents on the scute in the middle of the top of the shell, second one back from the front. I can't tell for sure, but it looks like there may have been some sort of trauma there in the past. Just guessing.