Malicious PDF — malware analysis report

Static analysis result for SHA-256 1816cdf7b9229963…

MALICIOUS

PDF

34.9 KB Created: 2020-10-03 15:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c21cc7b1fd52008e445658def7b287c SHA-1: 34295ea6750f8d20beb627c60b42c0ea1e6678f6 SHA-256: 1816cdf7b92299633e509fc76c88e2eeed7ba7bc3bf4ce34fa25c1189d468310
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that is also present in the extracted URLs list. This suggests the file is designed to trick users into visiting a malicious site, likely for phishing or malware distribution. No scripts were extracted from this sample.

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 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://gettraff.ru/strik?keyword=pokemon+fire+red+version+guide+book In PDF document text
    • http://xetel.frenetik.org/uploads/1/3/0/7/130739802/xalefamulujibedipi.pdfIn PDF document text
    • http://xubupax.perksautospa.net/uploads/1/3/0/8/130873995/883b374.pdfIn PDF document text
    • http://duwurisoz.ahealthypositive.com/uploads/1/3/1/4/131410952/vaxorabuvad-nadagazinazago-jilevuzij.pdfIn PDF document text
    • http://files.watervillefederated.com/uploads/1/3/0/7/130739621/pefigexolip_bamemipage.pdfIn PDF document text
    • http://lowapazes.boatinsurance.wales/uploads/1/3/1/4/131452839/poxukifekuv-tolomaketafuk-jamiwip.pdfIn PDF document text
    • http://mevogi.ptcwyo.com/uploads/1/3/0/7/130776756/modixutek.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/lisomevebezebojun.pdfIn PDF document text
    • https://site-1039895.mozfiles.com/files/1039895/sozanak.pdfIn PDF document text
    • https://site-1037267.mozfiles.com/files/1037267/xizozepizorubujuginabasut.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/sokokivinuwinesobowepi.pdfIn PDF document text
    • https://site-1041785.mozfiles.com/files/1041785/98759546753.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 6

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_off00004b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B88 5248 bytes
SHA-256: 54c7788805fabfbdcac3c718d9dd921b89704b9de91224323d419eeb041d71b6
font_01_sfnt_off00005d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D60 9764 bytes
SHA-256: 2d15b27f8d57fa870b2f3d146d83b8c47bddb7a179da164d13d138ce5609156c

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