Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ec24490e66a64f…

MALICIOUS

PDF

41.0 KB Created: 2020-09-11 17:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01703fc9e523fdec7db0a24baec995f8 SHA-1: 0043aaa731a98f90d1cb4a422ea4f048c73ff8e2 SHA-256: 15ec24490e66a64ff68b67771850d628024bafe3500639686498317330cf75dd
184 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document is designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=pmi%20acp%20exam%20questions%20pdf%20free In PDF document text
    • http://files.gearlockerla.com/uploads/1/3/0/7/130776755/47c2e.pdfIn PDF document text
    • http://files.mosaicsbysandisykora.com/uploads/1/3/0/7/130739919/womosobox-kerefezen.pdfIn PDF document text
    • http://files.learning4development.org/uploads/1/3/0/7/130775588/xekedutozimatevute.pdfIn PDF document text
    • http://wunifirut.makingpeoplewhole.org/uploads/1/3/2/7/132710634/lekadiravidiwamaxaj.pdfIn PDF document text
    • http://files.thestockmansbreakfast.com/uploads/1/3/1/8/131856119/wexifufagofikoxiko.pdfIn PDF document text
    • http://files.topographyandink.com/uploads/1/3/1/3/131379740/5434261.pdfIn PDF document text
    • http://files.bellacapretta.com/uploads/1/3/0/7/130739062/beparazuxofipom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cd79e3_ac81b52e0c804acab41e75a6c24c63dd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8d46c2_7458430fa72f4b0db33bfda42227641c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/80062767579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/fegumaxaxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4851/7275/files/bmw_z3_service_manual.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_off00005efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFC 5464 bytes
SHA-256: 03c0d88a380bedc79faf7b1721eb57b26259073919ac4632040c17dd9ce883d0
font_01_sfnt_off0000717f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 10904 bytes
SHA-256: 7d22b1c881e4f9202a994baab31df28a4985c448cfc09cf2a7aa6b8d218f927f

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