Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8839cf328d9abe…

MALICIOUS

PDF

38.9 KB Created: 2020-10-03 04:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd98c0068dcd0f63836323e4befa24dd SHA-1: 6394318d7daa497615a8f43d797ecc214632e073 SHA-256: 1e8839cf328d9abe5c487812802b9c014f09583b8fa634c6a74d7300ab7600da
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=business+process+framework+etom+pdf In PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/18873743375.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/taranuxinomape.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/xodukevopugojizimixijot.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/64173234414.pdfIn PDF document text
    • https://site-1040617.mozfiles.com/files/1040617/rizofunajozovamamuxi.pdfIn PDF document text
    • https://site-1039639.mozfiles.com/files/1039639/93018734292.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/sigizajofij.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/badifi.pdfIn PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/94261688076.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/12962008215.pdfIn PDF document text
    • https://site-1039259.mozfiles.com/files/1039259/63645720525.pdfIn PDF document text
    • http://kewet.cornellactuarialsociety.com/uploads/1/3/0/9/130969627/rojikavugikilej-xavukoponupi-litix-vipewoduzafomom.pdfIn PDF document text
    • http://files.aztecbaja.com/uploads/1/3/0/8/130814246/0ca3062b.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_off00005aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABA 5476 bytes
SHA-256: d5ae7b09ad087f682a4de3b99b8d9a4260e3b2550f95818e755b2d5e48ab162f
font_01_sfnt_off00006d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5B 9816 bytes
SHA-256: 8d17b8e359248f792307e800c0e3a31ea73e8d7322f1a2d142e5cc47d18c0044