Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e92369274795ba…

MALICIOUS

PDF

43.3 KB Created: 2020-08-21 23:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b29c0ef46c5230904836de92378432e8 SHA-1: ac6b5a0b02fd93223525c9dc59a5de030941e9dc SHA-256: 66e92369274795ba9bc75a34044e98ce09cd433d3d5357b0fdc6dd7270e1b763
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are part of an SEO link farm designed to redirect users to malicious infrastructure. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to disguise the malicious intent. The ML classifier strongly indicates maliciousness.

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=mathematical+analysis+a+straightforward+approach+pdf In PDF document text
    • http://gepej.yogadiversityinitiative.org/uploads/1/3/1/4/131437261/laroli_pezogijavamu.pdfIn PDF document text
    • http://files.professionalpolishingtouch.com/uploads/1/3/2/3/132302855/xejov_dorojaxog.pdfIn PDF document text
    • http://files.drloblaw.com/uploads/1/3/1/4/131407164/kikajigo_firerejakikavuv_sasosu.pdfIn PDF document text
    • http://files.wfyouth.org/uploads/1/3/1/6/131607063/35f412c1e559c67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/woxazotisogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/94526414343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/9612646674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/excel_data_entry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxasukazojolivuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/wopuzalobovidizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/27164322920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/35643824920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/kisena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/mathematical_physics_by_hk_dass_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3F 5556 bytes
SHA-256: 76906ea826efd3fc3b7171aaeb499e3c7c2cccfaf6809daffec51cc572c817d6
font_01_sfnt_off00006f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 10264 bytes
SHA-256: 84977f07789a520344d1674ceec6cff8b08db8152bfc63123b9315e63748a7cf
font_02_sfnt_off000091db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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