I can't find the malware code. Please help

Hi. It seems that i have a malicious code inside my site https://tinyurl.com/7ewmj4g , but i can’t find it. Opera browser has found it too! I have found base64_decode and strange codes in several files. But in the source code i can’t see something. Also sucuri.net can’t find something. Also my theme .. manifesto uses timthumb (shit) file! I have updated it in the last version , but as i see it has base64_decode suspicious file inside ( Not mine but the source page from google!) .I will appreciate any help.

P.S.
I have deleted all plugins
Reinstalled wordpress
Changed passwords and many other!