Malicious PDF — malware analysis report

Static analysis result for SHA-256 098710ae0bb22c64…

MALICIOUS

PDF

45.3 KB Created: 2020-11-03 23:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb23f48d1c77d6c558b38715d40332f0 SHA-1: 840e396a621ef4d606deaf3b486cd4753ecc6ab1 SHA-256: 098710ae0bb22c649b7e60549422f4d714a5650caa1451fc3b6de91bd245daa8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a sports championship and a URL that appears to be part of a link farm designed to drive traffic to malicious sites. This suggests the primary goal is to redirect users to potentially harmful content.

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=sports+head+football+game+championship In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f8b8398cab19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f8a6efb100d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f882ea028000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f89d290ed306.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f960d1001c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f8c9b123b04a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f89402b47381.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/c8cf6d29-98cd-4d77-ae5c-9c4b48283119/96131191779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8849/1689/files/kelixemeburi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17a6032-aa3f-488b-a8d1-f3fac9e2c8f0/fibupux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b57e9b0-88f5-4c2f-9a56-9d947681b115/zuxuwobusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7093/0075/files/27560513433.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_off00007182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 5812 bytes
SHA-256: 949bce8cd6ed55ecb00bd51233378327b9b15d5d674e04b5186da90cfdefc656
font_01_sfnt_off0000851f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851F 10316 bytes
SHA-256: 0c52954f52b894b3639be19b392980b9c4d4b0dcc745bb568b8e2d30fbce340d

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