Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af87c272c6316c1…

MALICIOUS

PDF

54.9 KB Created: 2020-10-11 16:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c821c3c7b1b0bbbce3bf572d82fac6a9 SHA-1: ae895f2c79fe09d374ee6172dbb5b6abf6470dae SHA-256: 4af87c272c6316c11de22b499566a9bb6b8223100672f410f36d8b344c8cc9ab
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=gilgamesh+libro+completo+pdf+telesecundaria In PDF document text
    • http://files.easw.net/uploads/1/3/1/8/131871633/wotamodazuvumut.pdfIn PDF document text
    • http://files.njsaferatios.com/uploads/1/3/1/6/131606583/jifisofikumef.pdfIn PDF document text
    • http://files.benshairstudio.com/uploads/1/3/0/7/130739340/febotu_putugunet.pdfIn PDF document text
    • http://tizapa.dcmspantherpride.org/uploads/1/3/2/6/132681337/sulor_bitifak_notexemijivuwab.pdfIn PDF document text
    • http://wajaves.amausainc.com/uploads/1/3/0/9/130969971/d136bb83.pdfIn PDF document text
    • https://site-1043260.mozfiles.com/files/1043260/38060683025.pdfIn PDF document text
    • http://files.furryzines.com/uploads/1/3/0/9/130969811/caa36d45e7c65.pdfIn PDF document text
    • http://files.saltandlightbaptist.com/uploads/1/3/2/8/132815054/safazodatadej-vopolovot-gijoxinile-kulude.pdfIn PDF document text
    • http://files.jasminequill.com/uploads/1/3/0/7/130739530/pedizamofufosaneb.pdfIn PDF document text
    • http://files.kompanimariposa.se/uploads/1/3/2/7/132712575/2229979.pdfIn PDF document text
    • http://xelib.firebrandministry.org/uploads/1/3/2/7/132712109/xegatafexa_labubafoso_bibenilige_lizumuroxofusag.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/1/0432/6454/0827/files/87903407633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7382/4678/files/53682114238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2022/9014/files/gordon_ramsay_cookware_recommendations.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C8 5740 bytes
SHA-256: 6bbfc17c6b87f48742641a1db16c4e7bd31f798c05cf2a68ab008c509dcde71c
font_01_sfnt_off0000ab24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB24 10496 bytes
SHA-256: e5f4587bebf6cf7930635ff921e03ae7f4a9e83f5972f9df7162ac300aad49e7