Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f5025694444ed1…

MALICIOUS

PDF

39.5 KB Created: 2020-10-13 03:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85889adef559e88ec28c42a53a103c63 SHA-1: 353ba5d1f572c77fbc7b8d6c700f2f865181431f SHA-256: 11f5025694444ed1fac957f9bfb55cc65b9d6f49eb193bcf249d4ed1581a4f47
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting and redirectors, indicating a link farm designed to lure users to malicious sites. The primary redirector URL identified is https://ggtraff.ru/strik?keyword=wireless+network+security+book+pdf, which is flagged as malicious. 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://ggtraff.ru/strik?keyword=wireless+network+security+book+pdf In PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/23646801781.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/wabadekusimofijapipev.pdfIn PDF document text
    • https://site-1038737.mozfiles.com/files/1038737/dajev.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/zedowolopukadofopelemami.pdfIn PDF document text
    • http://ruwow.communitybuildersnz.org/uploads/1/3/2/6/132682063/8ebaed28c74bd.pdfIn PDF document text
    • http://files.guntersvillelionsclub.com/uploads/1/3/1/4/131407135/wewilemutinaxin.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/modesovatizisin.pdfIn PDF document text
    • https://site-1039187.mozfiles.com/files/1039187/77895289950.pdfIn PDF document text
    • http://busajido.tblacblog.com/uploads/1/3/1/0/131070357/fekukuzi.pdfIn PDF document text
    • http://files.westech-rides.com/uploads/1/3/1/4/131482931/7509329.pdfIn PDF document text
    • http://vopofaket.penultimatephotos.com/uploads/1/3/0/9/130969264/kuxijapufidugoj-jomawizakog-zejejegekizudi-setobu.pdfIn PDF document text
    • http://files.isrgrandrapids.com/uploads/1/3/0/7/130775076/6335983.pdfIn PDF document text
    • http://files.lifebytheshore.com/uploads/1/3/2/3/132302992/buximeku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E63 5232 bytes
SHA-256: 5117a31938e687edcb11b02c59511269b4dab4a9f87fe3a7f88ea8d53b6a0365
font_01_sfnt_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 10320 bytes
SHA-256: c9e84e28f1dac64f2f0a666ccd9f49f3f50f2b8bb10ff2307d57113b272e4f75
font_02_sfnt_off00008325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3