Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec17fd94c83c7a1…

MALICIOUS

PDF

78.3 KB Created: 2020-10-12 04:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daf13b25cb59723942bb8d10f9fe5c93 SHA-1: ec7bbd2e1f59661267907b683fae5bb5d374d713 SHA-256: aec17fd94c83c7a165727997123340dc82148b3686bd9602167bb56c261656cf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/pify?keyword=the+adventures+of+brer+rabbit+soundtrack'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, indicating it's the primary lure. The file type and the nature of the URL suggest a phishing or malware delivery attempt.

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://ttraff.club/pify?keyword=the+adventures+of+brer+rabbit+soundtrack
    • https://site-1038322.mozfiles.com/files/1038322/xinuluxurapawogadopuvumeg.pdf
    • https://site-1040358.mozfiles.com/files/1040358/garanesol.pdf
    • https://site-1038595.mozfiles.com/files/1038595/xelekojovatagev.pdf
    • https://site-1039355.mozfiles.com/files/1039355/gatedokiwafukosoxodel.pdf
    • https://site-1037911.mozfiles.com/files/1037911/fufopogitofefaxuto.pdf
    • https://uploads.strikinglycdn.com/files/afc5d3b2-9c60-4c54-bae0-41bb8e623d79/24195145040.pdf
    • https://uploads.strikinglycdn.com/files/f79a3c83-8900-4f21-8eae-0be49bdeb54d/96851206209.pdf
    • https://uploads.strikinglycdn.com/files/966598ee-d6be-422d-be10-25241e36f6a8/bivajelu.pdf
    • https://uploads.strikinglycdn.com/files/b3b9c70e-b41a-4b51-9e8c-ce05be949936/bolewamojuroxivesasibu.pdf
    • https://uploads.strikinglycdn.com/files/73268510-9b69-4f99-977b-d9b04c023591/85023581416.pdf
    • https://uploads.strikinglycdn.com/files/1ccc6b34-5de3-49ae-8002-f75e45bb6ec0/tuzipipoxireju.pdf
    • https://uploads.strikinglycdn.com/files/4c8ba718-d6a7-4084-87a0-22c57810b7da/77835260833.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e809.bin
182bdb69e8581615fab9c196234ec414325ad1b44a2704be9e9f7b1c94c85c38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 3592 bytes
font_01_sfnt_off0000f4cf.bin
b5476da88ddd2be205ac706b16ee9076e3741835553627bf6e04785ce60f6945		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 5292 bytes
font_02_sfnt_off000106c7.bin
216a482bf256f90b7fe35eecdbac6f1c9a15c72eb1ec93b7a1c896ccd4f53668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 10812 bytes

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