Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d3d26f040884bb…

MALICIOUS

PDF

46.6 KB Created: 2020-08-22 03:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a5708bbed2a3ee0fbc7fba4cf8d0753 SHA-1: eef698421f9183c51110729965b079c6a1ab1ed6 SHA-256: 76d3d26f040884bb1528d3d62cdc931d22727427d552948e7f70ff577f44c6e8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded document body text, though partially corrupted, includes a URL that points to a redirector, likely intended to phish users with a fake IRS form. 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.ru/pify?keyword=irs+charitable+contributions+form+2017 In PDF document text
    • http://ruweworev.worldswarmestsocks.com/uploads/1/3/2/6/132681579/ditasiwiwodirepona.pdfIn PDF document text
    • http://jafinit.buttonwoodheights.com/uploads/1/3/0/7/130776659/zaropatel_liwakil_mivavez_sopevimit.pdfIn PDF document text
    • http://files.oldplunderuk.com/uploads/1/3/1/3/131383330/9751552.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/1/0430/5652/9565/files/94531006044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/1-_99_fishing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/52068527952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/mijupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/zesawejazarasabubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/forms_of_breach_of_contract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/neoliberalismo_concepto_y_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/wapakiberel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/nijunaxotedivemuzidaneto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/sakodekulopetukesaxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.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: buttonwoodheights.com 3 samples

Related samples 2

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_off0000775b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775B 5604 bytes
SHA-256: ab614ed683b64b8f60da4e2cc13bc5b9af4efc5cf210e5d253fc210198cc2641
font_01_sfnt_off00008a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3E 10244 bytes
SHA-256: 8df27060d15cf21dfe98b837ceebbc5f460bf752c944e4be3f45788e1d3c5917

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