Malicious PDF — malware analysis report

Static analysis result for SHA-256 5423bac2109dc693…

MALICIOUS

PDF

74.0 KB Created: 2021-01-03 14:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9fbf97b0c841ae54b2eb52fc0c3e061d SHA-1: e8f498f4ca4e79cd82b89a31f1ab1662015ad80c SHA-256: 5423bac2109dc693e0460b9fc514ad6530064a76e169a8fb63d231583b2fbc59
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/aws?utm_term=laboratory+safety+guidelines+powerpoint, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

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/aws?utm_term=laboratory+safety+guidelines+powerpoint In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fa599cd3e894.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/tedowafomaru/manual_motor_cummins_isx.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/stream_steam_games_to_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/hotel_california_english_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a50705-6228-4056-85dc-1cb7880f12c9/baseball_uniforms_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc9f61d-b190-4f6b-a653-7d5ef07d676b/sojusekogogo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/22331389761.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/levenson_self-_report_psychopathy_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/balance_sheet_item_crossword_puzzle_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/40145847215.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/bojeboluxaligadebofa.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_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 5484 bytes
SHA-256: 253cc802df82891eaa21a53c004e112dda626b2ad11d1388ce0a6d0fcec3c63c
font_01_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 10212 bytes
SHA-256: a8b9c3d2b742bb44b66d845ce80ab9976407c3f78af6dd6cfc1be22f7f832435