Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f31dca63d59d872…

MALICIOUS

PDF

33.8 KB Created: 2020-08-25 17:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0fdc6a89b5a75b2b0ea4557ad92f0b3 SHA-1: 49bf3059ddde18ae424dea2f10ab87084ea4c556 SHA-256: 2f31dca63d59d872a7a73421ddc2bc07e1962d5770b321896fef08448556394b
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and a reference to "Biohazard 4d- executer dublado", suggesting a lure for potentially malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify, which is likely a tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=biohazard+4d-+executer+dublado In PDF document text
    • http://tazex.p3oriontopsecret.com/uploads/1/3/1/3/131380600/renedutos-penepag-dojuxezoguzij-niramifevaleso.pdfIn PDF document text
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2982/1602/files/67965054434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/fixaxozobajazililome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/bivezusavevuzimulaladutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/70829325182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/kezepituzusejawijomiber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6509/6857/files/59871144461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/86444943405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/28225628647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/wells_fargo_online_statements.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C4 5276 bytes
SHA-256: 24946e6ab9445c0637bfc24b9f47a6d4899a0b9b9017e9c60c61fdeb96b05a4e
font_01_sfnt_off000059c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C0 9692 bytes
SHA-256: 4fb4a2920909e9751c9e113ea69d6e7065b3d6dc9858133856b4ca4846585edf

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