Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c32a3a2ed3ca86…

MALICIOUS

PDF

54.4 KB Created: 2020-08-30 00:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f4226b26beacaf4496eb4fa0935f2e SHA-1: be90a6fedb23f9f96ad39cc527cde292fe36a490 SHA-256: b5c32a3a2ed3ca86902a9de4b9c3e2605ba3432cebfbc75aeeff0a41c5a2fc89
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.ru/wix?keyword=r%25C3%25A9soudre+des+probl%25C3%25A8mes+ce2'. This indicates the document's primary purpose is to lure the user to this malicious site. The file also contains a PDF link farm heuristic, suggesting a broader SEO poisoning or link distribution strategy. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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=r%25C3%25A9soudre+des+probl%25C3%25A8mes+ce2
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/zujokisesamifu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/gujakenuwasezexutadadatu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/ielts_speaking_all_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/54824313677.pdf
    • https://static.usrfiles.com/ugd/493135_27e9b4d13e244d4e82f3386d44e78e97.pdf
    • https://static.usrfiles.com/ugd/07625c_e4c497660db746779a173fde1dedb093.pdf
    • https://static.usrfiles.com/ugd/d5d855_bbd7c80b0502463088e1d99ad55b2b8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_576285e4ae404ae18ba0628f93e268f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee522dcdb15c424eaa5624945089bed2.pdf
    • https://static.usrfiles.com/ugd/b8c837_04575e3c877248a19f699182ba6cc4b2.pdf
    • https://static.usrfiles.com/ugd/e02969_cf5c291e1df1402a8037705f5383b323.pdf
    • https://static.usrfiles.com/ugd/07ef24_2b51ea97609442f38f11ab3a53cfb1b7.pdf
    • https://static.usrfiles.com/ugd/0a593f_c342a227cc5f46fead66f19bcf6247ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1379859d0ae04611b2704b36c748368c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b8e.bin
091ba8111c7eec8bc98e4fb9f836f5eee1dc3a4972b7af6900b295a3cddae5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8E 5572 bytes
font_01_sfnt_off00008dcb.bin
322893e32a1f8c2fb7aa88542d99641202cd33e3e16636c7d92807a0a2eddd67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCB 12392 bytes
font_02_sfnt_off0000b476.bin
4e74c91031341c06b915725d15f052d77c33d75b7b3102a675f469d94d5ad539		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB476 16396 bytes

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