Except that similar fossils have been found with feather impressions, so in this case, it is at least reasonable to assume a likelihood that this animal also had feathers.
There are a great many fossil finds that don’t make the news, simply because they aren’t as “sexy” as finds like “Sue” or “Big Al”. But there have been fossil finds of hide, feathers, digestive contents, and occasionally other soft tissues. The dinosaur-era picture is a lot more complete than most people are aware of.
The term used is "protofeathers". The only fossils which have true feathers are those that are distinctly birds, the oldest such fossil is the archaeopteryx. One can assume anything one wants, but lacking proof makes such an assumption a fairy tale.