Malicious PDF — malware analysis report

Static analysis result for SHA-256 54851a339d89aacc…

MALICIOUS

PDF

58.6 KB Created: 2020-07-31 09:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04c2196d09f926d25ca491ff731a3b5f SHA-1: 75005933d0041587bf75860e1f3d2de9e5a15dad SHA-256: 54851a339d89aacc7c23913486c7d25a9c40acd478421ea33a32b7ddcc253eb7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a textbook download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The primary attack pattern involves tricking the user into clicking a link that ultimately leads to malicious content.

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=ethiopian+grade+12+chemistry+student+textbook+pdf In PDF document text
    • http://files.keverse.com/uploads/1/3/2/3/132303269/cebb1f79baad2.pdfIn PDF document text
    • http://files.stephaniejoycecole.com/uploads/1/3/0/8/130813417/024bd06d1736.pdfIn PDF document text
    • http://files.riggsrentalsiowa.com/uploads/1/3/1/4/131453555/bitigi-vewufusujiwil-ragisijinenoro-sajakalotolaf.pdfIn PDF document text
    • http://files.jakeryancreations.com/uploads/1/3/1/3/131380916/4314840.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/1/0435/2845/4298/files/nubewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/pezoraxiluduwejimovejegup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/vudedoresazubej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/73789049413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/bifililujukow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/91336198034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/jumiranipetenosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/radukubosilip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/ziwabejanunukobamubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/70665256632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/74828771034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/kesageko.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 7

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_off0000a4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FD 5932 bytes
SHA-256: 2d0f35c53fe5fd1594224e7bd4c856d58cfd3f36481d2f4a9bf3d397b9b4e9cb
font_01_sfnt_off0000b90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90C 10548 bytes
SHA-256: ac7e1ae78b41369901d126f9958cf681a683d9a10f1750936d7de2538cfe820b

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