This is normal. UDP is sent in bursts, and the small window of time in the screenshot shows a few dozen UDP datagrams in the timespan of one second, which is pretty standard. The answer to how much is too much is simply whenever it is so fast that packets start being dropped.
This UDP is coming externally, whereas a malware threat is internal. Not only was the malware you noticed not executed, but even if it was, it would not result in a burst of incoming traffic, rather you would see it attempt to connect to a C2 (Command and Control) from the inside. UDP is nothing to be scared of. It's a very harmless protocol used for high-speed communication when reliability is not a major concern. It is used in DNS requests, NTP, VPN traffic, video streams, video game traffic, and more. Look on the far right where the destination port and service are specified. Assuming the UDP ports are used for their standard services, the connections are:
- 1900 - UPnP (Universal Plug N' Play)
- 5355 - LLMNR (Link-Local Multicast Name Resolution)
- 5357 - WSDAPI (Web Services or Devices)
- 67 - DHCP (Dynamic Host Configuration Protocol)
If you are worried that some of these are unintentional, remove the services. None of them are themselves malicious, and the amount of UDP being sent to them is normal.