Malicious PDF — malware analysis report

Static analysis result for SHA-256 951da7ea5a27ec28…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 02:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f742690a51eb2bf5e3e3cf59c589c99 SHA-1: 00e658a36998299fdbfa9bc5093f63f85b94ed6c SHA-256: 951da7ea5a27ec2899813c1646c556c25771d7ebf84a67778388bf8a1993daec
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=arnie+the+donut+worksheet, which is part of a known malicious redirector infrastructure. The document also contains numerous links to Shopify-hosted PDFs, suggesting a tactic to obscure the malicious intent or to appear as a legitimate document source. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=arnie+the+donut+worksheet In PDF document text
    • http://lemovolup.serenitypools-fiberglass.com/uploads/1/3/2/6/132682076/cce4037.pdfIn PDF document text
    • http://pikilufof.hhsclassof1979.com/uploads/1/3/0/8/130814229/lumemabegu.pdfIn PDF document text
    • http://metigikiw.adventuresatyourdoorstep.com/uploads/1/3/0/7/130740572/9585232.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/1/0435/9317/1103/files/parasomnias_infantiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/12246246314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/zewagoxavadigewap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7402/7419/files/web_templates_for_school_website_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/college_algebra_essentials_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6866/1400/files/kuvul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0991/2477/files/19162069069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/vevukexowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/wuxujekadogemojexezoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/vugudadugerenamakukorof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/epidemiologia_clinica_fletcher_5ta_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3371/3050/files/gukegiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/90227251197.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_off00006496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 4816 bytes
SHA-256: ea2b0ba7509c937256ef2bb3fa4b6410a37522245943928ac45061c7d1e89e0c
font_01_sfnt_off000074fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 14556 bytes
SHA-256: 2a1de851c9c247eca355ca1203d218e71af6614cddfe75ce0419ded5b1141e1c

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