Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a839d1621f7e29d…

MALICIOUS

PDF

39.5 KB Created: 2020-09-18 11:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a82a22697faf63322be176c6490428a SHA-1: 6bc2eb9f0ab2470437a385ff134e20a8b5138887 SHA-256: 1a839d1621f7e29de811f4435029d901cb76116d2b61c8e83f0a49c53e15dd80
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is likely part of this malicious infrastructure.

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://ttraff.link/wix?keyword=glenn+vilppu+drawing+manual+pdf+free In PDF document text
    • http://debusaxe.viptowingcorp.com/uploads/1/3/0/7/130739090/wativetuxoleneli.pdfIn PDF document text
    • http://sepap.sashaface.com/uploads/1/3/0/7/130775678/1781304.pdfIn PDF document text
    • http://files.haidagwaiimagazine.com/uploads/1/3/0/8/130874102/131b17751f04.pdfIn PDF document text
    • http://xutemivu.sekimitsuscholars.com/uploads/1/3/2/6/132682711/2fc91c45.pdfIn PDF document text
    • http://pezogefox.animationofmortality.com/uploads/1/3/1/4/131407082/1453949.pdfIn PDF document text
    • http://ruwanoz.alternativecustommillwork.com/uploads/1/3/2/3/132303382/6778337.pdfIn PDF document text
    • http://tibimo.philipedwardsart.co.uk/uploads/1/3/1/0/131070351/964e6d1.pdfIn PDF document text
    • http://files.happywayhealing.com/uploads/1/3/0/7/130775845/2686573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ab6f931-778c-41e8-93cc-f855d317ade2.filesusr.com/ugd/3f1130_a149a5f0ae084b7481f2e0b9212686d9.pdf?index=trueIn PDF document text
    • https://7e8f2658-3d61-4d77-9bb3-23cbe212422d.filesusr.com/ugd/bc79a4_bb97f016d2af4ea6acfac3cf54fcdbb4.pdf?index=trueIn PDF document text
    • https://6b4d3051-b43e-4c02-9c03-a124fc9f15ab.filesusr.com/ugd/83d902_02812018db464c02aa256d724ca820ae.pdf?index=trueIn PDF document text
    • https://b439f56b-411c-46b3-858f-848e98660db0.filesusr.com/ugd/a76634_8b2968d8058c44e5983d2d278354f017.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/graco_duoglider_double_stroller_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3948/2275/files/66670354115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/51429487201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6049/files/heros_journey_graphic_organizer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5 5368 bytes
SHA-256: 76228288797a384756d67bdb0816440faca38cb805fc689c69838cd794d7b370
font_01_sfnt_off000068f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 12504 bytes
SHA-256: eda47511781898ade060a81241051befcceca109d2eefca09a38478d9e345296

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