Malicious PDF — malware analysis report

Static analysis result for SHA-256 194139384ffdce6c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 13:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 091c24f94ebb530732f6108174c7f661 SHA-1: a890b417f3474807c00befa9e5f6c1d6c76a0538 SHA-256: 194139384ffdce6cf4dae26ad5c6350ba6e68f903aeacaeb813cee1df7141eaa
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised as a medical guideline. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that this is part of a link farm designed to phish users. The ML classifier also 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=heart+failure+management+guidelines+2018 In PDF document text
    • http://files.bikewashtenaw.org/uploads/1/3/1/0/131070207/togusidusokuj.pdfIn PDF document text
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.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/1/0433/6890/6906/files/poporegagulonigopefuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/befegurazikikomibolok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9053/4561/files/29844438076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/40962782915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/a_practical_course_in_british_english_pronunciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/36206441296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/91361311882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/gevona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/lekedenij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/fumagagoxumevibufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2449/3213/files/9742942184.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 8

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_off0000707a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707A 5708 bytes
SHA-256: d24374a02b9ad8b7b6ccf97b26c5ed1124984da8f22c27c97ee9915a2ab9d351
font_01_sfnt_off000083c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C1 10372 bytes
SHA-256: eae8d610ec566a6b745b482d8e61723db4b9ecc10f7fd3b8c3b5c9346a7b46fe

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