Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea58c6a828f4aeb…

MALICIOUS

PDF

39.6 KB Created: 2020-07-31 07:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e4fafe59eb4947d063db993afcba768 SHA-1: 3b50405b4b0901566b70bcd1b69a82c4a4cfa392 SHA-256: 5ea58c6a828f4aeb26ddb58ceed22184c590f775481a4d14021c060f9ab244be
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a redirector to a URL that impersonates examination papers, likely to trick users into downloading further malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple embedded URLs points towards a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

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=authentic+examination+papers+from+cambridge+english+language+assessment+pdf In PDF document text
    • http://files.halfasshomemaker.com/uploads/1/3/1/1/131163859/wewakekopiwarev.pdfIn PDF document text
    • http://files.designsbynoodle.com/uploads/1/3/1/0/131070011/kiwowipedopovo.pdfIn PDF document text
    • http://files.davesexpressdelivery.com/uploads/1/3/1/6/131607467/9e47f07158.pdfIn PDF document text
    • http://files.soap-architects.com/uploads/1/3/1/6/131606169/runimo.pdfIn PDF document text
    • http://files.pscandi.com/uploads/1/3/1/3/131380258/bifoposekokam.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/1/0434/6124/7129/files/56629260977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/rufixofinuwugejawuleluja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/82341056843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/60543709264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/23539124424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1610/0762/files/jojadipised.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/matufatiwavipebudevifuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/14673325932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/molotudesodivefobedizum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/risuwobupomaguru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/83945787622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/lafujudib.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_off00005b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B50 5648 bytes
SHA-256: 22ac04281fffbff9e6c441e860ac694173b19d9f435aa29b4b0ff71ea946f381
font_01_sfnt_off00006e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 10040 bytes
SHA-256: a1e381154e937b62453693ee5ed37c90d5d65edcf1965c339d4501143650d992

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