Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e9423e92a58018…

MALICIOUS

PDF

39.7 KB Created: 2020-10-02 05:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac0face33fd3508488448e091a8e43cd SHA-1: daaa40b7115526f59805c11eab36a2d86cb0caf4 SHA-256: 46e9423e92a580180ab4f0090d8a51862382e2d1ea4bd52a1eb0a3d11dd8fdf6
184 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body text, though partially obfuscated, includes a URL that appears to be part of a link farm designed to attract traffic, potentially for SEO spam or phishing. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=2006+yamaha+big+bear+400+manual In PDF document text
    • http://files.tyeaton.org/uploads/1/3/1/4/131453132/8444097.pdfIn PDF document text
    • http://files.nhvoa.net/uploads/1/3/0/7/130740054/3552046.pdfIn PDF document text
    • http://files.popescreationsandthings.com/uploads/1/3/1/6/131607043/211bdf6836e09.pdfIn PDF document text
    • http://files.movingstarzpub.com/uploads/1/3/0/8/130814535/fukolol_xositovalereso.pdfIn PDF document text
    • https://site-1036737.mozfiles.com/files/1036737/17287849231.pdfIn PDF document text
    • http://mabigak.lister-hosedoctor.com/uploads/1/3/1/4/131483109/78b2d3580346206.pdfIn PDF document text
    • http://files.valhallamassagetherapy.com/uploads/1/3/1/4/131437657/3bd42f8e5c0d8bd.pdfIn PDF document text
    • http://files.yvfoodhub.com/uploads/1/3/1/3/131379729/suzet.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/1907edb7-84c5-4ba5-a27b-d64d1d1cce21/sepeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0035e6-6f6c-405c-a990-aa0cdf0814c7/fibuwinidojomuvokitekez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c14325e-f7e2-413d-b7ff-b92297dcef68/tufusobuxopiretoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7c5f76-1b7a-455e-b1ae-46d13f016d0c/12707896853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ff1dfa-f8fa-4c22-8df3-49229023afc6/tepajenolugosuku.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_off00005d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D59 5584 bytes
SHA-256: 216b31822f85636744b189247b23d9cb86f05fe6e778abecce5b5ffca04a6854
font_01_sfnt_off0000703b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 9980 bytes
SHA-256: 1da19a15c8e04697077a3fb06c4f4d03cba9ad8ec925ebcda33d53b41d8e7fc4

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