Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f131c12da80eada…

MALICIOUS

PDF

33.2 KB Created: 2020-11-03 12:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e4c9cc7ce1555aa28fc8a836a82fc1f SHA-1: 1f255f284a5422488a5547d8960e1e86e767cc21 SHA-256: 6f131c12da80eadabb8468194632335070554ec783f7ac1cd61cec045cccf82e
94 Risk Score

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/aws?keyword=kim+hardeman+attorney+iowa'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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?keyword=kim+hardeman+attorney+iowa
    • https://cdn-cms.f-static.net/uploads/4409096/normal_5f9841cb308ff.pdf
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f9d55891a29d.pdf
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f97e20079a0a.pdf
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5f9ef622bb935.pdf
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8c8f4955a62.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8b8202cde08.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memul/arithmetic_gradient_example_problems_with_solutions.pdf
    • https://s3.amazonaws.com/firigugixujotov/honeywell_lynxr_user_manual.pdf
    • https://s3.amazonaws.com/jexijer/best_fiends_apk_download.pdf
    • https://s3.amazonaws.com/xelimewat/escape_games_unblocked_google_sites.pdf
    • https://s3.amazonaws.com/fasanag/72901694732.pdf
    • https://s3.amazonaws.com/jusuberu/cabinet_minister_of_ap_2019.pdf
    • https://uploads.strikinglycdn.com/files/982c410d-d396-47a7-b558-de5170d331e3/kipikolujedetuxubeb.pdf
    • https://s3.amazonaws.com/medadele/xekeniverewepuza.pdf
    • https://s3.amazonaws.com/wiwuxot/57437885069.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_off00004613.bin
f77dc2f44fa51510cc04b236644ed9c0aab90206e5da2257c53d70e80e56da9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4613 5016 bytes
font_01_sfnt_off0000570d.bin
ce7e763bf49e812d7602569fc49e0b7c420e083c9a6c05da06ced7699831c704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570D 9888 bytes

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