Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd22f3b7dcf82d54…

MALICIOUS

PDF

36.6 KB Created: 2020-11-05 11:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aad34b643acc250b79d8ec637b2026b2 SHA-1: 3208efcf5bc025f80bf57168782b70b062940921 SHA-256: fd22f3b7dcf82d5404f7c377633a2e520a3b3b681e7e227a21d0dc51a8c36f4f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is heavily laden with external links, a common tactic for SEO manipulation or to redirect users to malicious sites. The heuristic firings indicate it links to known malicious redirector infrastructure and functions as a link farm hosted on disposable domains. The ML classifier strongly supports its malicious nature.

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://gettraff.ru/strik?keyword=big+summer+blowout+guy In PDF document text
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/9021050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f8e3e7bbc685.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/gopabi-xixiko-donodije.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/sitope.pdfIn PDF document text
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/7e471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f9373b7f0e68.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zamozojofijife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f9d5d1756812.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/kerofamexiral-muzukolu-jawojunapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f9f119683960.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/tetazino/signo_del_camalote.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/93098409799.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_off00005339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5339 5180 bytes
SHA-256: b9b724f1e15fb62ad17b9bbb58c862ddcb2400e152d1ec3d3175b831288bc612
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 9788 bytes
SHA-256: 1e6ca43c2a287a54b89b01d54c62b3c6bf7ca1e13dbc2e88853ed5f78a524f6d

Open this report in the interactive analyzer, or submit your own file for analysis.