Malicious PDF — malware analysis report

Static analysis result for SHA-256 71871484ac892265…

MALICIOUS

PDF

44.1 KB Created: 2020-10-31 03:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 73b34b2ba02b5ee695a0a08b4316077d SHA-1: 383a793ce044355c9e6c1f91aeb40de56db6d70e SHA-256: 71871484ac892265b59b977d2993936f5188cf6c5e0eac6f8437cfea09bd1050
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm or SEO manipulation scheme. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ggtraff.ru', suggesting potential malicious redirection. While no scripts were extracted, the structure and embedded URLs strongly suggest a malicious intent to lead users to harmful content or further stages of an attack.

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/aws?keyword=hot+dog+bush+2+game+y8 In PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/moruwozonap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8f904867b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f9158ef103e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f87e6b0a1e9f.pdfIn PDF document text
    • https://galuxenezinex.weebly.com/uploads/1/3/4/4/134437763/1e6d08e7de.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/judututizewena.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/3371986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5f98975c8d1d0.pdfIn PDF document text
    • https://wilixutisew.weebly.com/uploads/1/3/4/0/134095986/fuxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_5f96161b5b40d.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/noterufuwuxavo.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/9f2d3ef2-c1dc-4f76-bd56-8c180ca79fa5/82189818720.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/organizational_culture_reflection_paper.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 5640 bytes
SHA-256: 4bc464091ced8bd7d8a55243940bb4df9a6756efc1d6577b0bd8a06398fd9b5c
font_01_sfnt_off000080ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 10308 bytes
SHA-256: f83cc0aa8544db1c0fa5acc426790e015ffe7e85af3b0a37e28fe05519dbce1b

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