
Here is a list of some suspected search.yahoo.com redirects:
http://search.yahoo.com/yhs/?hspart=ddc&hsimp=yhs-ddc_bd
https://search.yahoo.com/yhs/?hspart=ddc&hsimp=yhs-ddc_bd
http://search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bir-sw-rhb-36__alt__ddc_dsssyctab_bd_com
https://ca.search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bcr-is-rhb-36__alt__ddc_dsssyctab_bd_com
http://search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bcr-sw-rhb-37__alt__ddc_dsssyctab_bd_com
https://search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bcr-sw-rhb-37__alt__ddc_dsssyctab_bd_com
https://in.search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bcr-sw-rhb-37__alt__ddc_dsssyctab_bd_com
https://search.yahoo.com/?fr=hp-ddc-bd-tab&type=dc-bcr-ob-rhb-48__alt__ddc_dsssyctab_bd_com
If it wasn't your intention to set any of the above suspected yahoo redirects as your default homepage and search engine, methods mentioned in this safe link will help you remove the browser hijacker completely:
http://rescueyourcomputer.blogspot.com/2015/12/get-rid-of-httpsearchyahoocomfrhp-ddc.html
Please be confident with the removal method introduced in this article for it has helped many users solve this issue.

You also can check if the method is helpful here: