Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb961f9a9e96a55…

MALICIOUS

PDF

40.4 KB Created: 2020-11-05 03:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c15c4ce898f4f0f4188cc0eeffb6de8 SHA-1: 624848ae3b7930959e0810e9a8754b1c5e74f6b3 SHA-256: 1fb961f9a9e96a55c320de8dde3048a37b9378ca7de993067e17c7ba73e04997
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link redirection.

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://gettraff.ru/strik?keyword=temperate+grassland+producers+and+consumers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5f99b180a242b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f97d3662c6e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5f9f81731e345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5fa330304be8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f956a7dedc50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f9b7f34c86bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8a421791f17.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/4224469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8b4cb825021.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/bodusojobi.pdfIn PDF document text
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/2c6e35e78e0ae.pdfIn PDF document text
    • https://pezosoxebigaxox.weebly.com/uploads/1/3/4/3/134337327/b4698662c88f33b.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/eeecac675cb2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 5340 bytes
SHA-256: c5185714bdca5102898334a4795c50be7d709b71ad69ab31ea30d18086e83ae0
font_01_sfnt_off0000712f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 10404 bytes
SHA-256: 1f1b64ab291a1d7614314c762e85b3f535c4be1770b1502f573fff83ee8929a9

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