Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d0c8b911a41888…

MALICIOUS

PDF

74.1 KB Created: 2021-01-21 06:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ba027c40a77af53919b214a243fafd SHA-1: 752cdbb59b2edbea4849826e1e5237128ead244f SHA-256: 40d0c8b911a418886fd67120be2ef58732a1c836e05190dea6d00fb97e5ba3ea
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=computer+forensics+cybercriminals+laws+and+evidence+second+edition+pdf
    • https://site-1255589.mozfiles.com/files/1255589/19629751101.pdf
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fec07786a994.pdf
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fef853b8160d.pdf
    • https://site-1175775.mozfiles.com/files/1175775/nasa_rocket_launch_video_download.pdf
    • http://faxozulakevosos.iblogger.org/placement_test_b2_with_answers.pdf
    • https://site-1177944.mozfiles.com/files/1177944/commonwealth_seniors_health_care_card_fact_sheet.pdf
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fe50bc60450d.pdf
    • https://site-1258376.mozfiles.com/files/1258376/u__s__news_best_high_schools_report.pdf
    • https://site-1177005.mozfiles.com/files/1177005/calendar_2020_august_printable_free.pdf
    • https://site-1210550.mozfiles.com/files/1210550/tegofebi.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5fc378d245703.pdf
    • https://site-1247202.mozfiles.com/files/1247202/79905930097.pdf
    • https://site-1171628.mozfiles.com/files/1171628/puxamipelazojibidobo.pdf
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8b4a9cc0b5b.pdf
    • https://cdn-cms.f-static.net/uploads/4394073/normal_5f920bde12bde.pdf
    • https://static.s123-cdn-static.com/uploads/4471995/normal_60050a6138bb7.pdf
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5f9ad43d5d9b1.pdf
    • https://site-1168207.mozfiles.com/files/1168207/gejokolimikedero.pdf
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5fecc31c4f38f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nabunuwo.epizy.com/rizisetawonarasob.pdf
    • https://s3.amazonaws.com/luworizesupox/genetic_practice_problems_simple_worksheet.pdf
    • http://tunazafagid.epizy.com/manidesanofivefor.pdf
    • https://s3.amazonaws.com/bufipevuril/pibilabiremanegor.pdf
    • http://sukujarodapix.rf.gd/best_form_of_magnesium_supplement_for_absorption.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_off0000df53.bin
bf2bb0a1cd99547f1c9e287310879d253b2f0b1971196ffcbaadb147452a5fae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF53 5600 bytes
font_01_sfnt_off0000f261.bin
325fdddb444c986b6e1bce2b3aa6fd5695778e3890a31f56f7cd1915ffe8ac97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 11516 bytes

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