Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a1a1c8d99a6419…

MALICIOUS

PDF

43.8 KB Created: 2020-09-28 20:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 045669c9961b31f09fab9f4a5030d391 SHA-1: aca9acff7c5f721859cda80069e840b8d13dacc6 SHA-256: 84a1a1c8d99a6419e429159540db565470879817f618284e98ed5f85172d1ba8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that redirect to potentially malicious sites. The document's content is designed to appear as 'entrance exam questions for class 11 science pdf' to entice users to click the embedded links, such as 'https://cctraff.ru/mozel?keyword=entrance+exam+questions+for+class+11+science+pdf'. The ML classifier strongly indicated maliciousness, and the heuristics confirm the presence of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme.

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://cctraff.ru/mozel?keyword=entrance+exam+questions+for+class+11+science+pdf In PDF document text
    • http://soxamanel.babaluusa.com/uploads/1/3/1/3/131398101/2361686.pdfIn PDF document text
    • http://damuxiz.nigerianngo.com/uploads/1/3/2/7/132740328/jerinil_zisoxudewom.pdfIn PDF document text
    • http://files.fbbcelitenutrition.com/uploads/1/3/1/3/131379639/pojanizij_jomunituzi_nevufafamu.pdfIn PDF document text
    • http://bilolaje.gcfishandgame.com/uploads/1/3/1/4/131437100/582461.pdfIn PDF document text
    • http://lagalirum.lightshapesphotography.com/uploads/1/3/1/3/131383483/garuteniba.pdfIn PDF document text
    • http://nojobew.superkickfoundation.org/uploads/1/3/1/3/131397997/danuxixu-luwobositisowat-legoj-demoxufuv.pdfIn PDF document text
    • http://files.leahradetsky.com/uploads/1/3/1/4/131438190/tifuwiki.pdfIn PDF document text
    • http://suzepoxek.fusionreadingandlearning.com/uploads/1/3/1/4/131453019/6792679.pdfIn PDF document text
    • http://files.michellehowelldesign.com/uploads/1/3/2/6/132682925/2aaf8178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://232470af-6617-4f91-ac8d-5475676b8795.filesusr.com/ugd/822ecd_be3b98acac784b389f4a241894c6a026.pdf?index=trueIn PDF document text
    • https://1d999fde-337c-42e5-ac8a-3dd137882950.filesusr.com/ugd/9904c2_5d34adbe8dd242649dc25630a5a6bcd4.pdf?index=trueIn PDF document text
    • https://dd754ec1-722b-4c94-9a24-cc75bbcfe04b.filesusr.com/ugd/5bb01c_4ef137e5b2f542fba4636b75405e7274.pdf?index=trueIn PDF document text
    • https://1b59872d-91f9-44fc-a05a-750a8e344185.filesusr.com/ugd/3fd21f_3873c5bd426841d482b65762cfde502a.pdf?index=trueIn 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 6

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_off00006bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEA 5504 bytes
SHA-256: e97dada001ac28dfa6083df054427ed474ffe31bcce57c07ca85ede36e5f9d6c
font_01_sfnt_off00007e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E96 10408 bytes
SHA-256: ef365b2d5e0fe4f38f53f18df0ef846c669ee58bebdea2c6ecbc1b474a009bc7

Open this report in the interactive analyzer, or submit your own file for analysis.