Malicious PDF — malware analysis report

Static analysis result for SHA-256 0184ed7b77ab02a8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-07 16:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e18f385138b2490160cdee988987def SHA-1: fd0d73b1fc4e8f3bf0d5d55b0494adffaa750f45 SHA-256: 0184ed7b77ab02a800753e4fe4136e01849e324799451ea9e14d183c0d795b50
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links that redirect to a malicious SEO link farm, likely intended to phish users or distribute further malware. The document body, though heavily obfuscated, contains text related to exercises and a URL that matches the malicious redirector. The ML classifier 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.
  • 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=lateral+epicondylitis+pdf+exercises In PDF document text
    • http://lulabu.critical-juncture.net/uploads/1/3/0/7/130775918/18d5030a7.pdfIn PDF document text
    • http://files.kingfisherpbs.org/uploads/1/3/1/0/131070149/5932025.pdfIn PDF document text
    • http://bobeputi.davideweed.com/uploads/1/3/1/6/131636612/gerab.pdfIn PDF document text
    • http://files.chisholmtrailexpo.com/uploads/1/3/1/3/131379268/e6c520f278c50.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/1/0434/9024/6822/files/canon_mp250_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/1695590025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/marulenomipojofugalereve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/70913977337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/pubulojosuxuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/temp_email_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/81415150936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/10788163106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/nomalura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/84417331796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/15832502850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.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_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 5260 bytes
SHA-256: d5814d91de615e3314d73cd22f7331de38f1f5717870e0cb29979e7fbe235b15
font_01_sfnt_off000073ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 10588 bytes
SHA-256: 3bc4dc1609b3ca4fb966026cd0edc2a662e67105de4fe635f88a77c3c8589916

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