Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b4babcd417f3ba…

MALICIOUS

PDF

38.4 KB Created: 2020-09-18 15:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: caf7b7e560e9f2bd46ef7dca1ac0b66c SHA-1: d86833cf493afb6f7aafa56273e7922f02f53703 SHA-256: 43b4babcd417f3ba155f6b8f3de87fe165e78a244371d3007ad9cccede16d2f9
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a suspicious redirector link and links to PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted from this sample.

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=edgar+martin+middle+school+lafayette+la+70503 In PDF document text
    • http://gorevu.ryanacademy.org/uploads/1/3/1/3/131382134/3d4aa1c02935.pdfIn PDF document text
    • http://nemikaru.royalbridalus.com/uploads/1/3/0/9/130969917/wodoferupejulazixabe.pdfIn PDF document text
    • http://files.lovejanaco.com/uploads/1/3/1/4/131407178/6671103.pdfIn PDF document text
    • http://files.hcfcorp.org/uploads/1/3/1/3/131398215/c3bfb51a.pdfIn PDF document text
    • http://bilotivi.amandalgamble.com/uploads/1/3/1/6/131607600/781902.pdfIn PDF document text
    • http://zusamelov.angelikabail.com/uploads/1/3/0/7/130740072/2061279.pdfIn PDF document text
    • http://tuzax.cowcrate.com/uploads/1/3/0/7/130740003/fekixikorar-fugagidubaxoj-mexekawuwunila-jenapebeduxi.pdfIn PDF document text
    • http://gidaruxi.dmlcommunications.com/uploads/1/3/1/6/131637814/jamiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0c226d4-8985-4db3-bbbb-a172ee23ff54.filesusr.com/ugd/97aff7_9d9bd66c44dd4a0480858008ef09bbb2.pdf?index=trueIn PDF document text
    • https://f25a5d76-8c48-4312-b36c-5b6a9e87a823.filesusr.com/ugd/8bf3fc_76a1bf6b05454dfeb8a2b2304d110e25.pdf?index=trueIn PDF document text
    • https://6b0d8c10-e643-4386-8d39-e6ec03cb4468.filesusr.com/ugd/b926a8_60c8fcc8023e444eba84a7bca324b687.pdf?index=trueIn PDF document text
    • https://54694e2c-d613-4a7d-ab1a-22dd29039df3.filesusr.com/ugd/81cd61_8a98fc46c42547d9939ef312bfb8fc39.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/21602020947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4192/files/attila_total_war_radious_mod.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 7

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_off000055e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E4 6004 bytes
SHA-256: f8c8e3eb6f122073c9bdd31f29b5b7b6a7b78b3439a2bd95c88a419e9bd11a76
font_01_sfnt_off00006a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 10060 bytes
SHA-256: 543e26c23a25b92a7b276405affb96234ea696556050d6fb577d2d633cf0f0ca

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