Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf49fcb93a14568…

MALICIOUS

PDF

81.6 KB Created: 2020-12-28 17:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8b28efdf91770645370cf1fdb3d7d7ba SHA-1: f2e21cac2188136198f61f91f54397f0a879d912 SHA-256: 8bf49fcb93a14568c6e70fb0a90a8547b3190a62c625e827e6de57093c3817d3
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The embedded URL, https://gettraff.ru/strik?utm_term=fm+radio+app+that+works+offline, is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=fm+radio+app+that+works+offline In PDF document text
    • https://cdn.sqhk.co/faxenukev/bhgkERm/jaradem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_5faaf4ace9fdd.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/hFsghNU/70068469411.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/bgfLgiu/pizekatidizawipezoxutoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f91b916cd77d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavitokolezub/31976736413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45aea83d-e0e4-473c-9025-d8ee6cd3c5b0/64102368592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7e764f-07e4-4a72-b0e6-efc5dc0436f0/70505199499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43e5499-3968-4312-b9ea-9150205e6bea/the_driver_era.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/abcd_film_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd766c66-b232-4626-acf1-0c8d9363dbf3/xepafenuvasox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f400c69c-11ac-4d75-a02d-9427d9335381/baxuxerukuzozunigupefew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af136ca-fb81-4493-8b92-6e40793d2a27/obscure_aftermath_ps2_iso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 5180 bytes
SHA-256: 01e1187bff6cb62d389e12a46a69acdb1a021e6322c611917e6e1b619800761b
font_01_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 10412 bytes
SHA-256: 96332e543b15c7283fa730252b073f1b5a1379d409ee8903adac8bc14d0e6462
font_02_sfnt_off00012b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B85 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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