Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8f1f944d02f333…

MALICIOUS

PDF

56.1 KB Created: 2020-11-02 02:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dbea78f46e0f92fcc99ff5611e195f38 SHA-1: 77007f264c872994448bfc601f69469d48bba363 SHA-256: ea8f1f944d02f333497106607e18e02f839517d600a90342954549eb6ed27e2c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, masquerading as a manual. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded links suggest it's designed to lead the user to potentially harmful content.

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://ttraff.me/123?keyword=mastercool+evaporative+cooler+owner+s+manual In PDF document text
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/7619314.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/5844407.pdfIn PDF document text
    • https://fajagewuw.weebly.com/uploads/1/3/4/3/134350503/3297467.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/muruma-xalumesiw-resusatoregu.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/ceb1bec25923338.pdfIn PDF document text
    • https://vinazawodix.weebly.com/uploads/1/3/4/3/134352366/06441ad928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8a4389b241d.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/wepupe.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/nuluri.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/0d54c03a-3c74-4bc6-846a-7094831422d2/12725383029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775c7c96-6d6b-45e0-8dcd-76ab605c4cbe/caples_lake_resort_for_sale.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_off00009a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A22 5236 bytes
SHA-256: cd4d93b16e913098adc9cb2a15ee0b641367edfc37c3010b6f4b440af0da6248
font_01_sfnt_off0000abfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABFD 11492 bytes
SHA-256: e46f602e2e2c58548894ae056766698324a50a85138168bb2b076a957c0903f0

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