Malicious PDF — malware analysis report

Static analysis result for SHA-256 481f562ce1374c19…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 08:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1c245e977dd8765f1ece1f8bfedc2bb SHA-1: 7800d3e07291ae5c324c6dadce9f4787616f0bf9 SHA-256: 481f562ce1374c19422d5365925edfa93f80a9634993fd4b595e79fb34e36ad8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary redirector URL identified as malicious. The document body, though heavily obfuscated, suggests a lure related to 'confined spaces risk assessment'. The presence of multiple links to external PDF files, many hosted on Shopify, indicates a link farm strategy, likely to distribute malicious content or phish for credentials. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=confined%20spaces%20risk%20assessment%20pdf In PDF document text
    • http://files.leafoutak.com/uploads/1/3/0/7/130739648/rizofarovim.pdfIn PDF document text
    • http://files.sdmarian.org/uploads/1/3/1/6/131606631/kafenir.pdfIn PDF document text
    • http://resop.centralofmelbourne.com/uploads/1/3/1/6/131636655/1948216.pdfIn PDF document text
    • http://files.selbylibraryfriends.org/uploads/1/3/1/0/131070911/a9dff903a67294.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/1/0433/4285/6344/files/xubaxedewojilofinebewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/755541310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/lakonakonudenipobog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/xezitovusezirovamol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4294/4677/files/18429324950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/form_st_105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5014/6723/files/59213344453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/chingiz_aitmatov_the_first_teacher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/19140865909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/bejowopukol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/ht2000_motherboard_manual.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 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_off0000746d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746D 5240 bytes
SHA-256: 12f298711649733473ca74052f98e66f3fb5f1d8ca790342f2a43630b3d0230e
font_01_sfnt_off0000862e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 10148 bytes
SHA-256: ad2ada7eef3b163009c3f22bb6e4977cdd262b372f7be68fcb27835a74af8e6e

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