Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc50219c462396fd…

MALICIOUS

PDF

42.4 KB Created: 2020-10-04 00:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80d3fea48205079b4b83c9bfdb512627 SHA-1: 11a615a183b905d2a379da5bbd146c82cef0d9f8 SHA-256: bc50219c462396fd4a406f4632c3297eb8f0f164009ef01ef8eab3e7a3b150a2
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a large external PDF link farm. The document body, though heavily obfuscated, contains a URL that matches the one identified by the malicious redirector heuristic. These factors suggest the document's primary purpose is to redirect users to malicious content or to engage in SEO manipulation for malicious purposes.

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://ggtraff.ru/strik?keyword=behind+the+paint+audiobook+torrent In PDF document text
    • http://files.stpaulspreschool.net/uploads/1/3/1/1/131164132/fc734533744d01.pdfIn PDF document text
    • http://teleki.bedfordbiblechurch.com/uploads/1/3/1/8/131857252/ea8b0.pdfIn PDF document text
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdfIn PDF document text
    • http://files.otscotland.com/uploads/1/3/1/4/131437615/2294979.pdfIn PDF document text
    • http://dupovo.spikemclarrity.com/uploads/1/3/0/7/130738948/muxujerimimenoga.pdfIn PDF document text
    • http://xoduvof.backwaterenterprises.com/uploads/1/3/1/4/131483372/4016771.pdfIn PDF document text
    • http://nukula.paws-ruff.com/uploads/1/3/1/0/131070289/8c6b917.pdfIn PDF document text
    • http://files.alphonseasylum.com/uploads/1/3/0/7/130740017/6993839.pdfIn PDF document text
    • http://kuzudab.eastsidehighwaydistrict.com/uploads/1/3/1/3/131379121/4806502.pdfIn PDF document text
    • http://files.lindseymaeeventsanddesigns.com/uploads/1/3/0/8/130813514/widumif.pdfIn PDF document text
    • http://zinudag.ralphssouders.com/uploads/1/3/0/7/130776445/tepub.pdfIn PDF document text
    • http://files.midnightsjourney.org/uploads/1/3/1/3/131384555/gagutekejawim-vunuwilerise-vateginijam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c103822a-b396-4698-b84c-9bc90a743761/70088761778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d7f1f8-02e5-4230-b249-151789c5dfe4/19586457974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40084bf4-2fd3-4444-9a5c-4f60aea8708d/bukinogibexalizomodot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfe5e92-6b93-4509-837b-984478ae7629/vegikofonixupedelenoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da28d541-7758-4979-b619-376d73b26b4b/zazibelinizefugiriwixu.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_off00006792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 5088 bytes
SHA-256: d4fc1576318d57b5d62a326acb45c7a319a30ce4c4147258dd8ab4b9ac05941f
font_01_sfnt_off000078d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D2 10560 bytes
SHA-256: 099713f192d9fa2bd3214fe0310fdc26218f61b4765826f585aebbeb24517bba