Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d2b69cfb104aa2…

MALICIOUS

PDF

49.3 KB Created: 2020-09-30 00:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 025be195c02d7cac2517a539b5f00410 SHA-1: d50e180351c7670cf8543b8afff9ac7ea2c6ddc8 SHA-256: f5d2b69cfb104aa28dae7ac6d1a8b551b9575bf89a4de07e900111e2e656b631
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links, https://ggtraff.ru/mozel?keyword=different+types+of+testing+in+software+engineering+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text along with some of the URLs, suggesting it's designed to host a link farm rather than provide readable 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://ggtraff.ru/mozel?keyword=different+types+of+testing+in+software+engineering+pdf In PDF document text
    • https://site-1036941.mozfiles.com/files/1036941/botefadenemif.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/vekozu.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/46540850136.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/jutiwatajokemulo.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/65327582718.pdfIn PDF document text
    • http://munudaweb.hughesenveng.com/uploads/1/3/0/7/130775990/dakegotojo.pdfIn PDF document text
    • http://rulaxozok.americaimproving.com/uploads/1/3/0/7/130776180/2051118.pdfIn PDF document text
    • http://tubibew.47secretstoayoungeryou.com/uploads/1/3/1/3/131379655/netovet-kusupaf-lapetuxufurez.pdfIn PDF document text
    • http://vasapa.vitalnutritioncapecod.com/uploads/1/3/1/4/131406717/kesobenul-gifadijem.pdfIn PDF document text
    • http://liviwi.mjstocksinvesting.com/uploads/1/3/0/7/130739431/lazulopabaran_regad_livepex.pdfIn PDF document text
    • http://pusojigal.pianomanlarryhunt.com/uploads/1/3/0/7/130775971/wisuzogukoxax-vakef-vixetasogis-dobivu.pdfIn PDF document text
    • http://xezipej.thesummitclearfork.com/uploads/1/3/2/6/132683071/dafunukidatewi.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_off00008336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 5368 bytes
SHA-256: 179ba3a160685d4a7878c2f5391970c9932bf24a640b7e63272b96d4ba01d911
font_01_sfnt_off000095ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 10020 bytes
SHA-256: 621f1c94161cff92009e15a0c0c58d52d6c40daecc709b2867f60eb19eb51dbf

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