Malicious PDF — malware analysis report

Static analysis result for SHA-256 966bf265efed2611…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 22:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f046fd8770d6c31212de195d6b5595e SHA-1: 02bf9c1e1e1050db25cac456c2f11445ac73bc0f SHA-256: 966bf265efed2611da88ec03a024a80f32f13fa4ffd533f2452758fc5f822c7e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'case study research paper' and includes the primary malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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=case+study+research+paper+pdf In PDF document text
    • http://files.hotcac.org/uploads/1/3/1/8/131857631/votuwi-jafebapo-belojaloxuduge.pdfIn PDF document text
    • http://files.luftgear.com/uploads/1/3/0/7/130776277/fudomi-kagobob-noposofage.pdfIn PDF document text
    • http://files.sheerramjohn.com/uploads/1/3/1/4/131437932/fad851581a2.pdfIn PDF document text
    • http://files.artculturevs.org/uploads/1/3/0/7/130775727/3763f1d2.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/1/0433/5301/4423/files/borulamutilabonunuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/25599611465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/83463607090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/wirefewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/91328116468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/45496304109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/43026045174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/lizigiditefuwigowiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/xomumutolef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/bomubukidunuzazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/dinixasojurosumedeniw.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_off000066ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5220 bytes
SHA-256: a72200d5049b514233b5c32ad2478804c830ae5fb9451dcf269787c0e960bcf5
font_01_sfnt_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 10024 bytes
SHA-256: d35e60d37ccc8135e590b146b05cecdbaeadf9e988786c348d8bcd56f8b09bc0

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