Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d5e36c37ebd201…

MALICIOUS

PDF

39.3 KB Created: 2020-11-01 07:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf2782bd15cbef2057b54a1d0d1e5669 SHA-1: 6dba487b7812034ff695046d6100a4d2bb8aac33 SHA-256: 07d5e36c37ebd201c177fe1eac8494d10f64782f42cab08b5297d437fca0d86c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links redirects to 'ggtraff.ru', identified as malicious redirector infrastructure. The document's content, including the title 'Jealousy in othello act 4', appears to be a lure to disguise the malicious nature of the link farm. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=jealousy+in+othello+act+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f95ef0f2c7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f8d7c3caa1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f92a8132d171.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/5074942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f88bb8b9948d.pdfIn PDF document text
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/4716562.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/e899ab285e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5f8ffdbf77518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8bcefa1c3c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2561/1931/files/77060536162.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_off00005d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 4968 bytes
SHA-256: bf602ae8e76a33d0d02751a275ad74049b65e4e9f5569c244081303d5d1df6a1
font_01_sfnt_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 10068 bytes
SHA-256: d8c706d71695cbebd5a4d845eed227bcccd1c230a313c1c2fba1f919c722d288