Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8e8973e5178ab5…

MALICIOUS

PDF

48.5 KB Created: 2020-10-02 14:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 7bfe0c105a1e80daedff7a7e67b72aab SHA-1: 0db849463357792d83f12a54c46101914a5d771b SHA-256: 5d8e8973e5178ab593d15f07e60ea409389a11e139716dd26707ed478edb9d31
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://ggtraff.ru/strik?keyword=kerbal+space+program+ps4+beginners+guide In PDF document text
    • http://files.teachersaidsforblindchildren.org/uploads/1/3/1/4/131453453/nulusapas.pdfIn PDF document text
    • http://jipigi.rgvmenu.com/uploads/1/3/0/9/130969284/4488996.pdfIn PDF document text
    • http://files.happiervalley.com/uploads/1/3/2/6/132695569/sewame.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/guditawavebolagimiwasav.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/93614766999.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/teguxeduzefonu.pdfIn PDF document text
    • http://wovuvama.labcharter-pto.com/uploads/1/3/1/3/131398589/3719203.pdfIn PDF document text
    • http://files.ewsrl.com/uploads/1/3/1/4/131483217/wezowajujipokan.pdfIn PDF document text
    • http://mexiwola.doreenleafdesigns.com/uploads/1/3/0/8/130874493/c24087.pdfIn PDF document text
    • http://files.jj-figurines.com/uploads/1/3/0/7/130738635/8dad9ef6a132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9E 5588 bytes
SHA-256: 76a472e4cf1d55d619a1be674a4ab098dfcdf7b80aa527ada402084937789926
font_01_sfnt_off00009189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9189 10388 bytes
SHA-256: 25c61813171ba32e76041cc00923a7aa2647d7329629550ac96b3a7b1156d313