Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac18b05979c0d9f…

MALICIOUS

PDF

44.9 KB Created: 2020-11-07 05:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a787751e6273bb4608beb784b367dd6 SHA-1: 12f896e9752dd95a53f0da221eac024b5ff88ced SHA-256: 0ac18b05979c0d9fbaa6dc533d14dc6144bbdcc3c2d889b0c0b4c581a8b3c558
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/123?keyword=chapter+11+modeling+meiosis+lab+answers, is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

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/123?keyword=chapter+11+modeling+meiosis+lab+answers
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f8aeb677c3f4.pdf
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5f9827e290662.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8e7c3e6a718.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ed0ee51-0648-4bea-8404-a117b37b1cad/11618426678.pdf
    • https://uploads.strikinglycdn.com/files/0fc82ca2-0954-4458-97d6-48aad6a1bfc5/tiweb.pdf
    • https://uploads.strikinglycdn.com/files/7f0ade6f-f15b-4e50-b28f-0ce47d865053/gumofubafesunubaziteladax.pdf
    • https://s3.amazonaws.com/voropa/bacilos_gram_negativos.pdf
    • https://uploads.strikinglycdn.com/files/d237bfb5-814e-4698-a553-1383ee783225/asternic_cdr_reports_freepbx.pdf
    • https://s3.amazonaws.com/fopalew/google_sniper_review_2019.pdf
    • https://uploads.strikinglycdn.com/files/62e1bb17-9294-4824-82a8-9d7d98939cc7/luzig.pdf
    • https://s3.amazonaws.com/susopuzupure/7358549020.pdf
    • https://s3.amazonaws.com/leguvefu/63609195310.pdf
    • https://s3.amazonaws.com/sivanira/diesel_fuel_for_life_cologne_50ml.pdf
    • https://uploads.strikinglycdn.com/files/89e872df-5fb4-4d3e-86cd-a5a2b365a61a/fnia_visual_novel_apk_download.pdf
    • https://s3.amazonaws.com/xanebavifamopez/income_tax_amendments_for_ay_2019_20_icai.pdf
    • https://s3.amazonaws.com/nokiva/81795764907.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eef.bin
25ce02aa82bd2acc8175a80fdf44047906d986ece6079786a88e3845eebda650
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEF 5560 bytes
font_01_sfnt_off000081b6.bin
c0b1d609264411f72e79e0314c7b38a6b980f883661acd2daa7b03bccaa7f253
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B6 11032 bytes