Keep getting spammed with ET SHELLCODE Common 0a0a0a0a Heap Spray String from an address

I’ve heard this code detects false positives all the time. Could this be a ddos attempt? I’ve detected some degraded network performance since this began. I keep getting spammed by this IP: 65.108.3.114.

One of my machines does use TOR. Is this something producing enough false positives that it’s worth silencing this notification?