Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2388221f287d2a…

MALICIOUS

PDF

73.6 KB Created: 2020-12-15 17:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c24a10261fcb7448c99418269f03b87 SHA-1: 7388896a1a1cb836edf842f68e7342a4d7556738 SHA-256: 6c2388221f287d2a1267c020fdb53fc282a63f03c64db40f68d6c6267913910b
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=blue+palace+locked+skyrim'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain metadata related to the URL, suggesting an attempt to lure the user to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=blue+palace+locked+skyrim
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f9e18d734e52.pdf
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fa354b3e3788.pdf
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5fcc871eac11f.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/4699356.pdf
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fa6ff0b4891e.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fbbc0b8c20d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tujeviwakirawu/como_deben_vestirse_las_mujeres_cristianas.pdf
    • https://uploads.strikinglycdn.com/files/29db6236-9a0c-4389-bd54-1a986870b430/the_penis_enlargement_bible.pdf
    • https://uploads.strikinglycdn.com/files/5337b1ee-6c08-4367-87df-927570a74b40/summer_infant_3d_lite_convenience_stroller_-_black.pdf
    • https://uploads.strikinglycdn.com/files/97789b69-737e-4fbb-a377-faa2530c5464/something_in_your_home_that_starts_with_o.pdf
    • https://s3.amazonaws.com/radubozufiwo/wabibetosanaxinomomijevox.pdf
    • https://uploads.strikinglycdn.com/files/e026b2bc-2490-45b1-b2d0-3909e6e34959/wosisiw.pdf
    • https://uploads.strikinglycdn.com/files/6c4f10ac-47b9-4ec1-8e32-67f52e0ed86c/sieve_tube_elements_and_companion_cells_are_connected_by.pdf
    • https://uploads.strikinglycdn.com/files/f5b885a0-d7ca-45dc-86bf-3f3d7e1b5aac/64963823595.pdf
    • https://uploads.strikinglycdn.com/files/8b3858de-c48f-4212-a78e-552f217ef2b5/57005745611.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d111.bin
c691e34fff877cce5c2d98e3fef94389b4d7f14bda3e13d56d6dca4cad2952c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD111 5128 bytes
font_01_sfnt_off0000e287.bin
f633837cc8b9c2e6a42ed16e217622b382dba194a20420619056d6a0941e7fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 12260 bytes
font_02_sfnt_off000109bd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 4324 bytes

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