Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37dd12d7e243b35…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 04:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78fa9c01ffb327a5a776d934c5aed4db SHA-1: f858bc41ffb50cf9428bc95de5cb0a2c1e95d290 SHA-256: d37dd12d7e243b3558c4ea76b9c5808d0fae5491ae83dce6c8489998ee1864e5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=diff%25C3%25A9rence+entre+moteur+synchro'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. The document body, though heavily corrupted, also contains references to the malicious URL and other PDF links. This suggests a campaign leveraging SEO poisoning or phishing tactics to redirect users to malicious infrastructure.

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.cc/wix?keyword=diff%25C3%25A9rence+entre+moteur+synchro
    • https://static.usrfiles.com/ugd/b8c837_a0810512acd148e5aa12591355ce86ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_70300b25231c4d90b4d255ab2c11a50b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8c9c619ac6b45a68c1f246175792e21.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2959c0194ca4f3ebcb6af47b4d3808e.pdf
    • https://static.usrfiles.com/ugd/b8c837_49007b2c08644b9cad967043ba02019c.pdf
    • https://static.usrfiles.com/ugd/b8c837_caba378897434a4e9a4c7be3dabc2fbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb86dd28dddd431db3c7d90919001e36.pdf
    • https://static.usrfiles.com/ugd/b8c837_770bf3c3d14943f8bd9de74929a16c86.pdf
    • https://cdn.shopify.com/s/files/1/0429/0556/7398/files/ansible_scripting_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/37011970477.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/97777576557.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/army_games_for_pc_highly_compressed.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/zerufedosub.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_off00006003.bin
2697917f48a61dcdcae4151a6be6e951adee82ae697450de00ccc2d5f2d503cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 5124 bytes
font_01_sfnt_off00007109.bin
bc16a246921e9718bb8ba1c83565097d8f04fe85a768e1bd6a34c03821a722b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 11592 bytes

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