Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67cb546b55d56a3…

MALICIOUS

PDF

58.5 KB Created: 2020-10-26 20:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4695343f9005c2441d3a941ad204958f SHA-1: 915dac28714207820328c61ca18fbcd75254d177 SHA-256: c67cb546b55d56a366b5bf7b6e5666cc45426dbff64eb92d631e50d7a24fc90e
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful destination. The PDF also includes a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=columbia+st+mary%2527s+milwaukee
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5f8eed8fabae8.pdf
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8e910e3eb67.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8b35b9562fd.pdf
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5f9618875e838.pdf
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/d758eaa23ed086.pdf
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/nibowozodi_raman_xuwebovojevokom.pdf
    • https://wiwazalokapig.weebly.com/uploads/1/3/4/2/134265383/jigefojavijem-sawug.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/mipekatire-tisupaloka-lanoba-suvan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xanebavifamopez/53507376847.pdf
    • https://s3.amazonaws.com/muxozuvalubi/grade_9_math_algebra_worksheets.pdf
    • https://s3.amazonaws.com/mukutud/gokozuwazafev.pdf
    • https://s3.amazonaws.com/fasanag/70322949516.pdf
    • https://uploads.strikinglycdn.com/files/133948b4-be60-4748-ba2c-2fc06c5015be/degufojugidadimumutufev.pdf
    • https://uploads.strikinglycdn.com/files/13aa2305-b089-46c5-9265-aa92a38d6d04/97918593948.pdf
    • https://uploads.strikinglycdn.com/files/8d3f2b0c-1cee-490f-94f7-b9519d3bdcf3/77870427345.pdf
    • https://uploads.strikinglycdn.com/files/a6d844a4-7efb-420f-ac1c-3702fb4b51ca/dos_poderes_en_cielo_alan_segal_arch.pdf
    • https://s3.amazonaws.com/didowugorokirug/computer_beeps_meaning.pdf
    • https://s3.amazonaws.com/sugaguxagu/kesisazi.pdf
    • https://s3.amazonaws.com/bifamomove/first_law_of_thermodynamics_mcq.pdf
    • https://s3.amazonaws.com/dabatisew/bnf_notation_in_compiler_design.pdf
    • https://s3.amazonaws.com/jotizifime/explain_sociology_as_a_science.pdf
    • https://s3.amazonaws.com/wilugugo/before_sunrise_book_free_download.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/6029778976.pdf
    • https://s3.amazonaws.com/vokeri/blues_chord_progression.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_off0000a8ae.bin
8b33b95082ee1edfacd86644139d20df45874203ad2e804d6a2a66b2a1cdcf49
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AE 5168 bytes
font_01_sfnt_off0000ba4a.bin
b289c0c8074176b1e50e53362ba2f285ec5b9eefffd9f6d1600abee63457d496
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4A 10080 bytes