c.betrad.com in my iPad mini website data

Hello everyone today on my iPad I checked the currency exchange rate on xe . com and waatched some videos on youtube and went to check out my safari website data and I saw "c.betrad.com" taking up 80 kb. I have my iPad set to only accept cookies from visited so I am wondering how this got in there could it be a virus or something? Also could this cookie have added some sort of malware to my iPad mini? I have deleted it from website data.