Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b75a30132711d17…

MALICIOUS

PDF

39.6 KB Created: 2020-11-03 05:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff44afc0fedac39fe9347e518dc71ec2 SHA-1: dcb58587b9deac306a472d7fa6d2f41ec9a95c3f SHA-256: 8b75a30132711d17496012b5fd100ccc6b327233dde5e4d5e767646c1cc23241
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=720+area+code+location+city In 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/4cf1ef1b-7f62-48fa-b661-c31851917fa0/89097749644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c4baf0-975b-4c63-853e-4149cb4dee21/depewamiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/37718842793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73bbe96-9f88-46c0-8769-1fc517aad500/hero_editor_1.13d.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/82329055766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d18bba-8589-44b0-8370-e7cab1fd9260/tio_bob_psiphon_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/warimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926b0156-b96a-4d31-aedc-9afb1b4078b8/81680303431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a9f0da-a139-447f-914f-6bf8fdc282c0/dress_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5d6920-fb65-4dd5-acb5-76228db498e5/gujupewixumosumuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32dd545a-0aff-4f36-b22b-32f28d1d45fa/29176720050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3482b93-4df6-4e37-83e9-af73539b7a0e/ragnarok_m_hunter_leveling_guide.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_off00005ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCF 5116 bytes
SHA-256: 43b46090e67654b90930c093d0e2e7b454627d0cd3d7a76dc3ccf5774da04b5f
font_01_sfnt_off00006e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 10492 bytes
SHA-256: 40cec92c3c9f3d83c98291c27566192e8152817c28a13bc442e55b6218c23eb3