Malicious PDF — malware analysis report

Static analysis result for SHA-256 588f7bcda1f14537…

MALICIOUS

PDF

46.6 KB Created: 2020-10-03 04:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2664cefc49146d33915a85d79766c104 SHA-1: 81108246b974a9083ad0b5293fc2f7e153f3f45f SHA-256: 588f7bcda1f145374a4bf19c97588e5864ca48f58a9f189a255f2fd51b881a65
184 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDF files hosted on disposable domains, indicating a link farm designed for SEO manipulation or malicious redirection. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.club', which is used to deliver a payload related to 'branded tv series theme song lyrics'. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded links and the nature of the heuristics suggest an attempt to lead the user to malicious content, likely as part of a phishing or malware distribution scheme.

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://ttraff.club/pify?keyword=branded+tv+series+theme+song+lyrics In PDF document text
    • https://site-1038981.mozfiles.com/files/1038981/xezewirawis.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/34472265499.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/tuvewinar.pdfIn PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/8583318365.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/xugozajuboxobuzotobasuro.pdfIn PDF document text
    • http://nafazo.charmed-liebling.com/uploads/1/3/1/3/131384306/1179549.pdfIn PDF document text
    • http://files.ourmotherslight.com/uploads/1/3/0/7/130776446/6067002.pdfIn PDF document text
    • http://files.nedwhitebooks.net/uploads/1/3/1/3/131397946/wupigaduri_woral_mimak_xujefozavawapuv.pdfIn PDF document text
    • http://fesuju.therapythatdoesntsuck.org/uploads/1/3/0/8/130814288/vorajedogos-risuvir-melujerex.pdfIn PDF document text
    • http://files.therosepetalinn.com/uploads/1/3/1/4/131452846/rirukumalixexetu.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/58cf93f6-9865-496c-af0e-fe18fe316fbf/gefusemufetilowifed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f90058-c5c5-4261-86b7-2aca919b7270/nelowamafukirefirezawusag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45efd612-470d-4edc-b51b-09a4619e182d/15411027085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e46f946-6e10-4015-a211-283e81c037bc/25941017130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e791c3c-a6ff-484b-b60c-c5acae4ac22b/bonanigetilitujaxuweritu.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_off00007749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5564 bytes
SHA-256: 70ce5c6f959c9f11cedc8a3b9ebfd4e1644b21d65d9b8fbc3d60021454940f6a
font_01_sfnt_off00008a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 10240 bytes
SHA-256: c6883c9a9c02a2616664202f62dbfdc63531851191968866286f5092d426096b

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