Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1ed8cabacaa7c6…

MALICIOUS

PDF

73.1 KB Created: 2020-12-28 07:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4ba2f095eab5807856d3d37c7121e85 SHA-1: 9afec58cd6bda00d5162564a3080296a83e0a4b0 SHA-256: 4b1ed8cabacaa7c608bb0c9ce8be1bfb36859115277102fe9dd92c180e827481
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=crossing+jordan+season+3+episode+10+cast'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the phishing or malware distribution intent. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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?utm_term=crossing+jordan+season+3+episode+10+cast In PDF document text
    • https://cdn.sqhk.co/fedelubu/jijhmhd/jurazup.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/fheBgdF/princess_beauty_makeup_salon_games.pdfIn PDF document text
    • https://rapovesotupoma.weebly.com/uploads/1/3/4/3/134353038/lagune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fa8ff0caa58a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fa8970082fbc.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/0c19b852f95d.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/f532ea8d-f345-4680-8235-9088a556cf12/83102707368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac87d62-244b-4e07-bddb-771e8fc3b6f8/phantom_2_dji_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/66870281480.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/pilakobedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fbbc77-3204-46d0-a2d9-241bd0b442af/kawunexivugasejemuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/stick_rpg_2_unblocked_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/schematic_eye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49232c1-6644-42f0-a604-3d98df57b56a/ludofofabakoje.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/lab_peppered_moth_survey_answers.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_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 5548 bytes
SHA-256: a05e535868998501eb9c8de4fba1bc678b6d11f17f4868f53a2eed7cb1b8ffc9
font_01_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 10688 bytes
SHA-256: d10f78716e2e4da14ea97b9ee5104b96fabf368b7ee62c616a823242a0ca05f7

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