Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80553d886ebac54…

MALICIOUS

PDF

56.2 KB Created: 2020-09-30 08:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a7ae0e46609bba2d6e7e6c987b69a18d SHA-1: bd7787b70d039a2edc8c3b096f5f275a4f3bb8a2 SHA-256: d80553d886ebac54a15337af8776bfbf304bbde383e65fd4fd46286fbc19b4cb
144 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains a URL that is part of this redirection chain. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click a link that likely leads to a phishing page or a malware download.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?keyword=neuralgia+facial+pdf In PDF document text
    • https://site-1037106.mozfiles.com/files/1037106/85708652821.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/vosaz.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/88708332971.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/paxibodedidojotoxenikos.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/73417755521.pdfIn PDF document text
    • http://files.alwaysgetbetterstronger.com/uploads/1/3/0/7/130738997/jedigovivojinal.pdfIn PDF document text
    • http://jawavoxof.jimmyzhan.ca/uploads/1/3/1/4/131407558/2293992.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/24022045142.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/mifomodivivunisiwujisotir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1108/3935/files/54947021662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/22831026345.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E68 5116 bytes
SHA-256: 32bd063216ecb64f95523a9303dff0112c4ad72bcaafc9939ad910ece1c69b92
font_01_sfnt_off0000afe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE3 10604 bytes
SHA-256: f4674a2efc2ec836c9c1cac6daf7a447bfa2713628ef4bc8acfd0d3be17f9954

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