Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2574545ae2d369…

MALICIOUS

PDF

41.8 KB Created: 2020-11-01 19:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de01e9bde2c8bc22d422858ffa15a5d2 SHA-1: 1db08167bb4debf9c1a8cddbd8026021c44ed245 SHA-256: bc2574545ae2d369669a88fb938da1104749b388a6d1fe7defe994ff1034f4e2
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a user manual. The embedded URL, https://cctraff.ru/strik?keyword=ti+83+plus+user+manual+pdf, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=ti+83+plus+user+manual+pdf In PDF document text
    • https://mokogexikimowo.weebly.com/uploads/1/3/4/3/134321985/9f278657e.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/zeniludokubuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8b17539897d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41f06ae-dbbf-4762-8c29-fe826b42654c/binegugevelugebogapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/2020_aprilia_rsv4_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2815/9381/files/99563386223.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/delowitabojoravaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f05141-ea62-49e0-b3d6-b39f6260794a/gazawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3996/3325/files/calculadora_cientifica_gratis_para_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9449/5398/files/wayside_school_gets_a_little_stranger_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56b3430-d50b-45ba-850f-ecc66b630632/63672015504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8483/1638/files/no_no_boy_summary_and_analysis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5496 bytes
SHA-256: f4639a861bd0b7a94da39986f96f66744ff592a999609a433b0c0e784da5d2ba
font_01_sfnt_off00007897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 9948 bytes
SHA-256: 0019007e5ed64db6a77991fdf4228c61663e99fc68a9e141d94f9c000af7d4d3