Is my hamster a purebred or hybrid?

[NewHamOwner]

I bought my first ever hamster from petsmart. They said she is a winter white. But I’ve been reading some posts and they say most pet store hams are hybrids. Can anyone tell me if she looks like a pure winter white or if she looks more hybrid?? It doesn’t matter to me because I will love her either way, I just want to know. I’m worried if she IS a hybrid that she will be prone to more illnesses since I’ve heard that hybrids tend to have a lot of health issues. Also, if she IS a hybrid, I feel as though it’s really wrong for petsmart to not disclose that information. Since she’s my first I don’t know a whole lot about hams so if she does look like a hybrid what do you think she’s mixed with ? She is grey with white cheeks, a white belly and white tail and a black stripe that starts on the top of her head going down the center of her back.
Here are some photos of her:
https://photos.app.goo.gl/zZUjNrEe4BRoYGuAA