Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9d41021a92fdad…

MALICIOUS

PDF

44.3 KB Created: 2020-08-26 04:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa90309442da5cf380d98521c54e1ae1 SHA-1: 862113078ef433562b5b2044dbaa3cda34ecfed0 SHA-256: 5b9d41021a92fdad2ed1a44750311155ae8fa56d6712c79a2382250e9cf1ca68
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, identified as a redirector for potentially malicious content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the primary purpose is to drive traffic to this site. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=a+painter%2527s+guide+to+design+and+composition In PDF document text
    • http://files.dtctravel.com/uploads/1/3/2/8/132815924/dunivekoguvukisudu.pdfIn PDF document text
    • http://susajak.yonispretzelchallah.com/uploads/1/3/0/9/130969130/7680076.pdfIn PDF document text
    • http://xalegak.layagsug.com/uploads/1/3/2/6/132695601/1846340.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/1/0430/7651/8049/files/calendario_escolar_2020_sep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/43280135342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/58204576029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/66145340621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/alistar_support_s6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/82266324730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/luwanuwoxigele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/positive_attributes_of_personality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0134/files/33101769016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7486/2758/files/ocr_biology_examiners_report_2018.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 5

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_off00006e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 5384 bytes
SHA-256: 0be0fb7c86ad108e277bade5e21956b5b04a63b22c8a926e3d752c48937cf1b8
font_01_sfnt_off0000807a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 10228 bytes
SHA-256: 61841e1a35aea9e1af1e666c04bb41940bbfefd1bb9e36aeac61a8d360765b6c

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