Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f54acb745045c8…

MALICIOUS

PDF

52.8 KB Created: 2020-11-03 01:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02d2ba5a3d3c082e6ce911bbd6a5320a SHA-1: 2507eb6049bec9970be9fed137fbaefe02da28ac SHA-256: e2f54acb745045c8c84f40113a193ef8f47827c075c5a3b24cab290a6ed5b1c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=watch+rio+online In PDF document text
    • https://kutozeworefo.weebly.com/uploads/1/3/4/3/134306688/xurinugafofove-veluzu-muponulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5f97ab45002aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f8ff6548edb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5f9f09bd40fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8742b7103a0.pdfIn PDF document text
    • https://wumotobu.weebly.com/uploads/1/3/4/3/134370577/lilis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_5fa0876c5a9f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/598537b7-0c7c-4568-ba83-a6b5cf51840c/dextrocardia_telemetry_lead_placement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3880/1063/files/riwigaradixejepito.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 4508 bytes
SHA-256: 2d9522e91950b8d0b0b77807069ad71ccb1655bfea9354d2c21ccb1dc8cf466c
font_01_sfnt_off00009303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9303 11108 bytes
SHA-256: 082907d18b86e421e9c8c773123a628a6dff36c652de83e25f5351c52f9c2d44
font_02_sfnt_off0000b893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB893 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2