import zipfile

zip_ref = zipfile.ZipFile('malicious.zip', 'r')

def extract():
    zip_ref.extractall('./')

def get_size(): # checks the size of the uncompressed data
    res = 0
    for i in range(len(zip_ref.filelist)):
        res += zip_ref.filelist[i].file_size
    return res

if __name__ == "__main__":
    total_size = get_size()
    print("The size of the uncompressed data is: %s bytes" % total_size)
    if total_size < 1024: # e.g. extract the data only if the uncompressed size is less than 1KB.
        extract() # The uncompressed size is more than 20GB :)
    zip_ref.close()