Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4b5a5b452a1d27…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 11:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c92f4fa5aeb93cb22530a384af7399d5 SHA-1: 4a95659e799ae1df78cd62c93622afe92b631d83 SHA-256: 6c4b5a5b452a1d273dae0f3a5c7df690688f741cbbf2361dbc869bb0fff091e4
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links designed to redirect users to external resources, masquerading as legitimate downloads. The primary redirector URL, https://ttraff.cc/pify?keyword=physical+science+textbook+pdf+9th+grade, is flagged as malicious and part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=physical+science+textbook+pdf+9th+grade In PDF document text
    • http://files.maryzambello.com/uploads/1/3/1/8/131857114/1c70a1.pdfIn PDF document text
    • http://files.yumava.com/uploads/1/3/0/7/130738741/wezosexi_posetobom_dapusamusi_jebunote.pdfIn PDF document text
    • http://tuludap.workingparentstories.com/uploads/1/3/1/0/131070722/wipusitalelaf.pdfIn PDF document text
    • http://files.elenatziollo.com/uploads/1/3/0/8/130813108/dutajedol_kevedenelisufo_nivakaga.pdfIn PDF document text
    • http://dedibij.lovebarcelonacity.com/uploads/1/3/0/8/130814229/6e842d1a4b08dea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/91783164768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/boulez_structures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/tyra_b_still_in_love_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/jixelebegalegoxoropov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/80253188291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/kejemovixasijumekodapobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1381/2903/files/laporan_praktikum_argentometri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/suvazidananotib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/17865223200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/71690014390.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 3

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_off000065a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A5 5948 bytes
SHA-256: 063eb66c70f3400a4dd0bef5e44c28a86c604cd5feae26b0ba8bdbd66d3942ad
font_01_sfnt_off000079ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79ED 10112 bytes
SHA-256: f51447c35e6eed46ed27b67b7f8466a0eac2c001ad3bf394a9a31238389343d8

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