Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ac73a15b36fff8…

MALICIOUS

PDF

178.4 KB Created: 2020-09-11 13:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0dc67d081aa5f3513fbf67ae25447dec SHA-1: b0aa088cf282a1038b948f161fea1a2cf21fa76c SHA-256: 23ac73a15b36fff86d03400a1b4e3094a823f72bed69534b10853c063cadbbef
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=esophageal+varices+guidelines+aasld'. This indicates the document is designed to lure users to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. No scripts were extracted from this sample, limiting further analysis of its payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/pify?keyword=esophageal+varices+guidelines+aasld In PDF document text
    • http://files.planningprotocol2.com/uploads/1/3/2/6/132682042/jotanufag-sivonajupi-jasowir-nexefupowudebu.pdfIn PDF document text
    • http://files.ktrpo.com/uploads/1/3/0/8/130874615/dbc2e6e3e2a.pdfIn PDF document text
    • http://mofobu.heathcotehousenursery.co.uk/uploads/1/3/0/9/130969685/731271.pdfIn PDF document text
    • http://files.ladyannestrunkomaha.com/uploads/1/3/1/6/131636807/588a702b235eda.pdfIn PDF document text
    • http://files.mindgility.co/uploads/1/3/0/7/130739892/ae28b6676629.pdfIn PDF document text
    • http://files.alieninvasionmusic.club/uploads/1/3/0/7/130776223/3621595.pdfIn PDF document text
    • http://rudinex.inspiredbygeology.com/uploads/1/3/1/4/131453133/e23bb341df.pdfIn PDF document text
    • http://files.forksandblooms.com/uploads/1/3/1/6/131606875/da5659252187798.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/d51d36_d6ce8b93c0b2403d969aa2fab0dc79a3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/72b0e7_775c65a3908c448598b88d435bc19d5d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/dononegasaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/19363335498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7442/7809/files/weruvu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26072 5352 bytes
SHA-256: 9cfc181be1a1bc68964ef7f46ec2eeb5c72099cf3f55770ecc07d317d1c29213
font_01_sfnt_off000272ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272AB 17096 bytes
SHA-256: 2eb74a559301aecb40cfc55eea3725077876ec0f431863d27ff6258dacea03dc
font_02_sfnt_off0002a750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A750 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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