Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9239f0340a8c3f7…

MALICIOUS

PDF

45.3 KB Created: 2020-08-19 04:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e3d75478aba40d113f1076844753c037 SHA-1: 9402edc27c9a34d34ab055e9363f69a5536da7fc SHA-256: d9239f0340a8c3f79d19ee958b0e2218259b9830d20ae68f0f002a255972c092
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as "knowledge base article template examples". This link leads to a link farm of numerous PDF files hosted on Shopify, indicating a potential SEO poisoning or phishing campaign. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and the PDF structure itself are indicative of a redirection-based attack.

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=knowledge+base+article+template+examples In PDF document text
    • http://files.middleclassempowermentzone.org/uploads/1/3/1/1/131164260/4652949.pdfIn PDF document text
    • http://sejejeni.seagrasspottery.com/uploads/1/3/1/8/131872225/856360.pdfIn PDF document text
    • http://files.sterlingreputationspr.com/uploads/1/3/1/3/131382595/fofosurufunakomexut.pdfIn PDF document text
    • http://files.kinder-equipt.com/uploads/1/3/1/4/131483281/5464694.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/1/0434/7058/6006/files/vifotutugigepakubuzej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/sedurinewevup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/administrao_pblica_patrimonialista_burocrtica_e_gerencial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/ginidulaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/vifovarabar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/kovokaxinejug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/95171244582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/7529716418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/jefalataxudalexosawig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/7150027429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.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_off000071bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BF 5664 bytes
SHA-256: 28db679db15ed7f912cf5d38168babba3b166c9bdf9cbcfd4faa8963404bec6d
font_01_sfnt_off00008505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8505 10244 bytes
SHA-256: aec0449aac239ccde84001e28cbe3dbba55f0e932c3e441ae4383af352c06099

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