Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b2feaeb4264478…

MALICIOUS

PDF

40.0 KB Created: 2020-09-21 08:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 02b121dda40f37cb6148478016d1e0c7 SHA-1: 70226df94f95480f022be1d9f75423f8258b9ffe SHA-256: 13b2feaeb42644781623e55f144f4db3cb1570e4d4c8f7f3025a97eaf23cb2b2
224 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and are likely part of a link farm designed to distribute malware. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link farm, suggesting a coordinated effort to redirect users to malicious content. The presence of a 'Password-protected archive handoff' heuristic suggests the PDF is intended to trick the user into downloading an encrypted payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ttraff.com/wix?keyword=hosted+378+renlearn In PDF document text
    • http://files.ccraftmc.com/uploads/1/3/1/1/131164394/dujupuwibi.pdfIn PDF document text
    • http://tokosew.maxblackphotos.com/uploads/1/3/0/9/130969685/wipasu.pdfIn PDF document text
    • http://files.midatlanticdrn.com/uploads/1/3/1/1/131163960/nodajezovuvibogo.pdfIn PDF document text
    • http://fopiwov.carolinaconjure.com/uploads/1/3/0/7/130739590/5920171.pdfIn PDF document text
    • http://zuluvajun.gamers-corps.store/uploads/1/3/0/7/130739783/265faf38c.pdfIn PDF document text
    • http://lujigax.something-new-every-day.com/uploads/1/3/1/3/131380126/jugajepibaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7329538e-b839-4c41-8d04-3b0541eeac76.filesusr.com/ugd/e23fbb_b40ea434b7d7493db8c549e058c09778.pdf?index=trueIn PDF document text
    • https://6de9734a-62a7-4b71-8e3d-d03caeeee6ea.filesusr.com/ugd/ac8c68_36a187b2ad804d7b982dc4892cc7c8a1.pdf?index=trueIn PDF document text
    • https://72fb6f80-41c2-47ba-bc67-c7ab5ae40ceb.filesusr.com/ugd/e4ff69_6276d615c0b440fea58f33587b5c5a58.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 5220 bytes
SHA-256: 57c328f2985a9bb0c2083784b9a3e290483829762a39df097560f27bc6ac4ace
font_01_sfnt_off00006bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC3 12588 bytes
SHA-256: e2d5568ce6526f10fc746ccf0d1c84a76e98bf4b1bd2675493d0ddc0422d1346

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