Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f8bab91c786ed2…

MALICIOUS

PDF

46.0 KB Created: 2020-11-01 16:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c36be16b7036b708f60186dee6755dc SHA-1: 9584ab3abcc790c7842d5581c8fd2eca63a81675 SHA-256: 61f8bab91c786ed2bc557c5df94858b17bc9fe01534a18a14351770624068f88
94 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/123?keyword=sat+exam+dates+2020` is the primary indicator of malicious intent. Although no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

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/123?keyword=sat+exam+dates+2020
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/0f3ff4d9aa318f.pdf
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/vopipixep-wavaniw-witag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5732d9be-7dda-43cc-801e-8f1a81002205/68839777445.pdf
    • https://cdn.shopify.com/s/files/1/0501/5817/4396/files/stereoping_matrix_programmer_manual.pdf
    • https://uploads.strikinglycdn.com/files/73ec5ba3-afed-429e-86a6-2c13aeba07ce/xunojamebigekixiwegomanis.pdf
    • https://uploads.strikinglycdn.com/files/f57e88e9-be6f-4e22-8302-66ac72085691/fivesixi.pdf
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/safety_mode_verizon_cost.pdf
    • https://uploads.strikinglycdn.com/files/2ea6b3d5-36e7-4218-94e3-9336ea35501c/97499871319.pdf
    • https://s3.amazonaws.com/zirojopemup/22768578830.pdf
    • https://uploads.strikinglycdn.com/files/38e1c2f8-a510-4220-b18d-d9711b4943e7/puppy_is_pregnant.pdf
    • https://uploads.strikinglycdn.com/files/e1ba4e2c-702b-40fe-b68d-822e92f7742f/varapuv.pdf
    • https://cdn.shopify.com/s/files/1/0268/6677/8295/files/slope_standard_form_example.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_off00007486.bin
faa1368fdad317d698818b038a6440518c6e877c0edaaeee18722203c638089f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 5288 bytes
font_01_sfnt_off00008675.bin
8deb628a7eae372fff30319d998c0920b4222e408c5691c4b6a658c20c58720e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8675 11212 bytes

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