Malicious PDF — malware analysis report

Static analysis result for SHA-256 99bd949b68a085d2…

MALICIOUS

PDF

47.4 KB Created: 2020-10-28 17:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c01e8d8dd40f7aeea5d39630d63cb571 SHA-1: cb3728b5257e5d63d7f319be9c634f4e8f979c86 SHA-256: 99bd949b68a085d25bda08d2f49c02df5c0e10ec069a46ed2dd2c653cb8d862e
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF documents hosted on various domains. One of these links, 'https://ggtraff.ru/pify?keyword=ghost+of+john+origin', is identified as a known malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to lure users to potentially harmful content, likely as part of a phishing or content-farming scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=ghost+of+john+origin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f9570fae237e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5f98a6a66d8a8.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/4dfe24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f94d7a321d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8e689a4e99d.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f8ed2fb90278.pdfIn PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/6fe8b0b8b45a.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/5d2a1d.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/343c997e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5f9628cd4c486.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/5dda0f93e5907c1.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/9708270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5f8df554e32e5.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/fifasofile.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/zupenafud/aspekto_ng_pandiwa_worksheet_for_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/53722338550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/58868428108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1239/7507/files/96368878454.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/6976688532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4147/9578/files/jurita.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/42100945760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0708/6239/files/dacor_oven_manual_self_clean.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/97840751952.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_off00007afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 4896 bytes
SHA-256: b476ecc8fe7b8ea626b7cc27934f62ba87f22b8f112f7c04f1d420706bacfc41
font_01_sfnt_off00008baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAA 10784 bytes
SHA-256: 76a88677a4bb1ada194f3503ca06ef646282861fc4d553ea120aa1e2e6ac72c3