As the title indicates this is for VT links only not the posting of file sharing for malware samples.
They should be sent directly to avast, as you have no control over who might access this link nor what they might do with the sample. So please remove the link.
Send the sample/s to avast as a Undetected Malware:
Open the chest and right click in the Chest and select Add, navigate to where you have the sample and add it to the chest (see image). Once in the chest, right click on the file and select 'Submit to virus lab...' complete the form and submit, the file will be uploaded during the next update.
Or
Send the sample to virus (at) avast (dot) com zipped and password protected with the password in email body, a link to this topic might help and undetected malware in the subject.