Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f7ef6b0bf2edba…

MALICIOUS

PDF

68.1 KB Created: 2020-12-17 01:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f96fcf4b52b66ec9ca56a6644575db2d SHA-1: 91ebccace05c594d18047a585b78fb844dc29466 SHA-256: 84f7ef6b0bf2edba07015cad89eff10723bd263aca25256c6d231f40bebe529b
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to redirect the user to a phishing or malware-hosting site, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=vivah+picture+movie+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477163/normal_5fd157da21207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf502e7acac6192ab757ae/1606373424394/solving_recurrence_relations_using_tree_method.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/xepumufemasajilejun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fd919849b27a00a3c0c7/t/5fcb2aeca51c5a1401a5850f/1607150316797/vh1_tv_shows_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/ralobijisujimatelifutawo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29eebabaecd33182d3b3b/t/5fd14dd0b5865457dd494db5/1607552469027/redunaviguwewexoduvunezi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc296815e8e827d4298a2f8/t/5fcfcf4696b13538a782a32a/1607454536425/supilugegoranu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc181a368612547ed627098/t/5fc55c55173fb5383b56399a/1606769750058/spivak_aesthetic_education.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1bb67bdb33045eec822d5/t/5fc2d801fa04221c717e05fb/1606604802898/81770359219.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b5cb161f8068bec97957/t/5fca4d5e856278751768b3e7/1607093599488/what_is_christianity_beliefs.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/bullae_formation_in_cellulitis.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/bhojpuri_video_2019_ke_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/billie_eilish_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/never_eat_alone_keith_ferrazzi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65937acac6192ab90066/1606378900169/fermented_spider_eye_minecraft.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_off0000cb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB96 5340 bytes
SHA-256: f0b0f91a65d6475e24459c76c6e90ba812f89c160248efeb5ad83fe6ca74c5e2
font_01_sfnt_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 11384 bytes
SHA-256: 8e283d9958c8bc0fe9f744822f6263959dc22a9eef43d8c77cd91d7a7f840086