Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe51ef6a9fe516a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 02:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a90ff29a40b76e4d3edeb15f58961c6 SHA-1: d6cf1d45514d82792f56f083196b16e1c06d134c SHA-256: 5fe51ef6a9fe516a4f6c44fe167ff60a9867d75df31220aac7fc1227bbf17359
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary link redirects to a malicious domain, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to lead the user to a harmful site.

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=astigmatismo+miopico+compuesto+pdf In PDF document text
    • http://files.satelliteaerialsystems.co.uk/uploads/1/3/0/8/130873822/e60c40572a752f3.pdfIn PDF document text
    • http://mufiw.littlechristianpreschool.org/uploads/1/3/1/4/131453060/16f26fc48.pdfIn PDF document text
    • http://files.primrosehillpto.org/uploads/1/3/2/6/132696077/jidutapat-kemenefewekivo.pdfIn PDF document text
    • http://files.sorgsportandwellness.com/uploads/1/3/1/3/131379789/rokakinetudirati.pdfIn PDF document text
    • http://files.albertoniego.com/uploads/1/3/1/8/131871644/rapebewesovupo-bedadu.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/1/0434/5636/4709/files/83490725011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0467/1646/files/digital_electronics_logic_gates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/weekly_hourly_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/61548333966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/32085860331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/20890239190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/zoregogubebolegawimon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/vipulumibakatij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/gurudowodejelumas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/midumelumatate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/49776474997.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_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 5336 bytes
SHA-256: 18406be63fcb730c20287995ba7e17b3aca95ffc6b9a28eec0052a2cb2a68dd2
font_01_sfnt_off000073ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CA 11852 bytes
SHA-256: 7a73989487e48ea9621425f31f5aee8f54300508810d31fc6ecd29df381073f7

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