Malicious PDF — malware analysis report

Static analysis result for SHA-256 4567d329e352d27f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 20:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bc7acbb55db24447ebfb490b07e1cfc SHA-1: c35e2fa9842bf47dc22337fd628c99e60e6d18a2 SHA-256: 4567d329e352d27fd881b4fb95e5a0f1da024bd719bb1d481c3935b8d916b4fb
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many pointing to user-uploaded content, suggesting a link farm for SEO manipulation or malware distribution. The embedded URL https://ttraff.club/wix?keyword=series+y+sucesiones+ejercicios+resueltos is identified as a malicious redirector.

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.club/wix?keyword=series+y+sucesiones+ejercicios+resueltos
    • https://static.usrfiles.com/ugd/b8c837_c9f6869b972445329dbd2fbf0133938f.pdf
    • https://static.usrfiles.com/ugd/b8c837_64679c48eee6424bac4ab83588e1050b.pdf
    • https://static.usrfiles.com/ugd/b8c837_11734de3b77c411581461eb84533a23e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c06aa9a950d47d0ab8dfdb6f6a23d72.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/2nd_edition_monster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/tipos_de_antimicoticos.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/muzica_crestina_penticostala_veche.pdf
    • https://static.usrfiles.com/ugd/902d29_6a53c92c29924326b0802b5f4af23a55.pdf
    • https://static.usrfiles.com/ugd/b8c837_8012811e613d4442b9bae7f5fa8b8c84.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_off00007c45.bin
1d08b838f4075f24efa6a4026adab1588c7190349c31cdf46dd8be371d21a808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C45 4864 bytes
font_01_sfnt_off00008ce6.bin
2d9f2bc9c84a4af5f8900d3bcb969de97e7b3fe1fb3b0f1a049a5933a54bd890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 11500 bytes

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