Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b71e7b38c9a09…

MALICIOUS

PDF

37.3 KB Created: 2020-08-30 03:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 462c071e75dbe71f4bf14b3cae0a1f02 SHA-1: def35b9d3a1ed8e102be1a1ea4e46c1de6968fbe SHA-256: 347b71e7b38c9a09f6c36e91c78fadd2312198c1d6eede841c4ea3a7e72bfbbb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'Solitaire for windows 10'. The document also contains a large number of embedded links to external PDFs, likely for SEO manipulation to improve search engine ranking for the malicious link. No scripts were extracted, but the presence of the malicious redirector and the lure indicate a phishing or social engineering attack.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=solitaire++for+windows+10
    • https://static.usrfiles.com/ugd/74c34a_88e1a157c6c3468ba1d616bd969a0369.pdf
    • https://static.usrfiles.com/ugd/87a178_ec4df64309654a6eb7f8d5bf06f2160d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba5fa293ed1a4ec099233b8be7ab6b80.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce75dd2301734b02896539888198b395.pdf
    • https://static.usrfiles.com/ugd/80c1db_c6b06f75c2544eb98cc53836d6766dff.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a168aa21abb4672b0bcdeffe4bc379d.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_fb39b1f987a54fff9e77df9c81032ed4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/zixafikiju.pdf
    • https://cdn.shopify.com/s/files/1/0437/3371/3050/files/91525292769.pdf
    • https://cdn.shopify.com/s/files/1/0447/1940/7257/files/windows_server_2008_keys.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005450.bin
dacaae9b17c4443445287df553d1d64a0497288384939a39f2d71fc81c4f643d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5450 5288 bytes
font_01_sfnt_off0000666a.bin
58b06f8eeed24a04809abd7cfae6276b09bea244b0c914b751e91f8452f09f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 10052 bytes

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