Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14ef8b4841ff651…

MALICIOUS

PDF

51.9 KB Created: 2020-11-06 17:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73ab09378d3619eaac23a349fcbe7cac SHA-1: d72c855e37f733af2d381c16913bd198ed146ced SHA-256: f14ef8b4841ff651a4409899c1657ad8b3b7a2398450a846591ca0a6480bdc9d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, including a critical redirector link to 'traffking.ru' and a link farm pointing to many other PDFs. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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://traffking.ru/aws?keyword=osrs+duo+raids+guide In PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/tusaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_5f9d8715a8224.pdfIn PDF document text
    • https://guxewegitonis.weebly.com/uploads/1/3/4/3/134336720/gifobuvem.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/4778530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fa396117786b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5fa4271c632af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5fa4a2c9e2243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f8a7b8295bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5f9f5bcc41330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f973a5725407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5fa1f3bf51880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/rexatepeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/5e_dm_screen_reincarnated.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_off00008a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A10 4988 bytes
SHA-256: 94eecc8f7c886cc5fccaaf45884dfc97545b95844001017512358e13e00dd5a8
font_01_sfnt_off00009b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0D 11872 bytes
SHA-256: c64655499638f208c024dd6f5894ded7ed085c4a6acad641ac768cb3291caf11

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