Malicious PDF — malware analysis report

Static analysis result for SHA-256 2119d3d9e20f7796…

MALICIOUS

PDF

97.2 KB Created: 2021-01-05 19:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: baa57c69ab5376b782506da6e1445192 SHA-1: 936300d00142ef776c7f57350d5ef31e93e7574b SHA-256: 2119d3d9e20f7796ada06d91a8f418f4613baa65a018fc70029f69db65feca61
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains links to known malicious redirector infrastructure. The embedded links, such as 'https://gettraff.ru/123?utm_term=how+to+make+a+graphic+novel+online', suggest a phishing or malware distribution attempt. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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?utm_term=how+to+make+a+graphic+novel+online In PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/c778384f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fe2e23c903bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5fa5d3fc9386f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bunny_girl_senpai_ed_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/when_you_believe_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/arshin_mal_alan_film.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/my_wish_rascal_flatts_lyrics_with_guitar_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/satizodakonerovi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/zotixez.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/dirukafudaluguwatibexiz.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/characteristics_of_effective_listening_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/happy_birthday_piano_tune_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/biogas_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a3e464-1321-46a3-9d6b-4eab9b12040d/28351641325.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/bts_love_yourself_answer_traduo.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_off00013e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E85 5344 bytes
SHA-256: 1b1182582a99b637d8ae6caf495b2e08eec70f3bbae5bc839c9257ec373897da
font_01_sfnt_off000150a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A1 11664 bytes
SHA-256: 6e2fd475d30987b78717323308a15dc8f93f836cce4289e1bd70f2928cda7591