关于用户代理ddg_win反复请求/favicon.ico的技术咨询

最近我在服务器的Apache日志里发现了一个标识为ddg_win的用户代理，它只盯着/favicon.ico文件反复发起请求。我特意搜了一圈，居然完全找不到这是什么工具、为什么会重复请求的相关信息。有没有大佬了解这个用户代理的来头呀？

下面是昨天日志里的示例片段：

45.36.70.0 - - [18/Sep/2024:00:14:46 +0000] "GET /favicon.ico HTTP/1.0" 302 555 "-" "ddg_win"
45.36.70.0 - - [18/Sep/2024:00:14:50 +0000] "GET /favicon.ico HTTP/1.0" 302 497 "-" "ddg_win"
45.36.70.0 - - [18/Sep/2024:00:14:51 +0000] "GET /favicon.ico HTTP/1.0" 302 497 "-" "ddg_win"
45.36.70.0 - - [18/Sep/2024:00:15:18 +0000] "GET /favicon.ico HTTP/1.0" 302 497 "-" "ddg_win"
45.36.70.0 - - [18/Sep/2024:00:15:18 +0000] "GET /favicon.ico HTTP/1.0" 302 497 "-" "ddg_win"
45.36.70.0 - - [18/Sep/2024:00:15:21 +0000] "GET /favicon.ico HTTP/1.0" 302 497 "-" "ddg_win"

备注：内容来源于stack exchange，提问作者BenVida