Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a18f4f71a4cedd2…

MALICIOUS

PDF

90.0 KB Created: 2020-10-01 14:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-31
MD5: 51c1fd5394390be4e0d63167dc5e820f SHA-1: 6a87f016ccb1313ff46c25b84167baf1382eb410 SHA-256: 5a18f4f71a4cedd2db3d86a12a4ac04f0c615839d56a4f893db688ebaaa10db6
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=christmas+piano+sheet+music+free+pdf In PDF document text
    • http://files.grantclifford.com/uploads/1/3/1/1/131164174/3a5b2c.pdfIn PDF document text
    • http://files.healing-ginger.com/uploads/1/3/0/8/130813755/410598.pdfIn PDF document text
    • http://files.ladieslearnenglish.com/uploads/1/3/1/4/131438694/ketitope_masax_wenapus_talutaka.pdfIn PDF document text
    • http://files.thetruthhemp.com/uploads/1/3/0/8/130813458/d3834f5.pdfIn PDF document text
    • http://wesigot.2241squadronatc.co.uk/uploads/1/3/1/4/131483378/goniduxidokoxu_wofuwumiwe_vazeb_seboveziwako.pdfIn PDF document text
    • http://siximewa.midpointconstructioninc.com/uploads/1/3/0/7/130738681/fuzif.pdfIn PDF document text
    • http://files.tydafydd.co.uk/uploads/1/3/1/4/131406356/loledodoxaw_rewoxamavata.pdfIn PDF document text
    • http://files.cfg-ecommerce.com/uploads/1/3/0/8/130814100/c95a0a8e5339ad.pdfIn PDF document text
    • http://files.strokecarelongisland.com/uploads/1/3/0/9/130969755/789230.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/eeab713a-94da-4dae-a546-38d75ce4a164/tulatigofaxelaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1700cfd7-ebbb-4108-8b8e-5245b78e52fc/lonogazipikovutupot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0126b0a7-1085-4925-b0fe-6a8af9fc1786/lekoxevelefijuwemubuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f63737-3327-46ad-b38e-5d7b4b3d283d/gilumifevijir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8ce609-c5d7-4d21-9643-dd2b961a7257/16863099156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3466a10d-fe7e-426b-9671-99966bc7c538/sikedubiwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5211bd7-f218-4e35-96d6-fa5b72648e91/21505342525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c0dd1d-3641-4b8c-897f-439282a95fcd/1298788988.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_off00012225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12225 5268 bytes
SHA-256: 6c3e98b43a39f98808c8f84538b2586b3e1f1eeb919c615a71b925e7f0599419
font_01_sfnt_off000133d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D9 11308 bytes
SHA-256: 76efc2152e3194e939894b5f98a00640df1c383fc6548a744a5e484f7d8afbe3

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