CardAttribution Avatar


I have placed the twitter:card of summary type, twitter:URL, twitter:image, twitter:creator meta tags in my website. On the card validator page - I see these information in the div with class=‘cardcontent’ but on top of this I also see another div with class=cardattribution. In this Div there is a title and image, I don’t understand where it is coming from. Any help would be great. Thanks.