Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af2d87560c41e07…

MALICIOUS

PDF

45.0 KB Created: 2020-07-31 04:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95d686f3599eb9833d674cf03419fde2 SHA-1: 28bc80f7182b4ce38e15316f29c65d271fa7bdc7 SHA-256: 3af2d87560c41e07558de65911bd1255d4cba54f5c06dc89c29f042205dea4f5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or distribute malicious content. One of the primary links directs to a known malicious redirector, ttraff.com, which likely leads to further malicious sites. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO spam PDFs.

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=bending+moment+and+shear+force+diagram+for+cantilever+beam+pdf In PDF document text
    • http://files.burntofferingsbbq.com/uploads/1/3/1/8/131871554/5b2c7092.pdfIn PDF document text
    • http://files.thelutherie.com/uploads/1/3/1/4/131483336/devujatugebe.pdfIn PDF document text
    • http://files.hprugs.com/uploads/1/3/0/7/130776602/6097517.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/1/0429/9161/6153/files/34732800637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/mubiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/58350178494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/votat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/zuxutewifawojafilomup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/55549845021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/86489688888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/kejajakomipomafoniku.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
🗂 Part of campaign: burntofferingsbbq.com 5 samples

Related samples 4

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_off000071a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 5604 bytes
SHA-256: 00207d42637ffe553706e1e851a61a13df8b262a9a355f6e3f7c012e11312614
font_01_sfnt_off00008484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 9988 bytes
SHA-256: 7b6748b81844b409beaae42187e48fc3b880f15242dc9a1def756f65e26dcf0e

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