Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa918f74b2de9570…

MALICIOUS

PDF

34.6 KB Created: 2020-11-01 14:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7e2f7d44a83e0a0a9cf2d8cdd970c140 SHA-1: 9d1b777d53d35ad631183f07b29770afe4d8e752 SHA-256: fa918f74b2de9570654b17b6a104c028ba4ea009f0badc546198ddc62fc35e46
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=knights+of+columbus+fish+fry+2018'. This is further supported by a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and a high ML score. The document body, though heavily obfuscated, also contains the same URL, indicating its primary purpose is to lure the user to this malicious destination.

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/123?keyword=knights+of+columbus+fish+fry+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f88cf82c6556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f95173e81248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f8e5d85e07a0.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/eeb6f.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/tafalarenad-suxakepago-dalevilegovo-ziwox.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f936be6ce7d7.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/3cec58ca-dc7d-4e31-86a1-88ac19c6115c/69630515538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d808ddd-6de2-44d5-bf44-50fe57b0a883/80545529085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75a3a19-ea63-4efc-b0bb-17731d3b6402/65975436523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e49ab4-cbae-4d68-93c6-c1625031f3d2/motorola_xpr_2500_manual.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_off000046e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E3 5816 bytes
SHA-256: 4374ac63ef31e7dbeef0a048f5f9249bfcff4665598d0c1db3dea7396a3b6119
font_01_sfnt_off00005aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 10312 bytes
SHA-256: 4df25050898051f4b383c068d8918ad594e4c7b46c0ee958e1d97f6c3605517e