Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5dca7417648fb3…

MALICIOUS

PDF

42.4 KB Created: 2020-09-09 15:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19c97fb1aa5b5f8958bcf8f2b5d48f6d SHA-1: 6412db24225132ba8713024e20057d2a06559f37 SHA-256: 4d5dca7417648fb36c9a9872d4e815bc20e91ff1519513762f3e2d558d0d174b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL pointing to a known malicious domain. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be part of the redirection chain, suggesting the primary purpose is to lure users to malicious sites.

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.club/wix?keyword=singleton+class+kotlin+android In PDF document text
    • http://files.idahogermanshepherds.com/uploads/1/3/2/8/132815003/tejunak_dezoxejopeka_dixobeti.pdfIn PDF document text
    • http://files.smile-movement.com/uploads/1/3/2/8/132814463/1611b54cf6.pdfIn PDF document text
    • http://files.cagaragedoorrepair.com/uploads/1/3/2/6/132683017/53b7330c0d.pdfIn PDF document text
    • http://files.phoenixhypnobirthing.com/uploads/1/3/1/6/131606687/2736204.pdfIn PDF document text
    • http://files.2bendthetrend.com/uploads/1/3/2/6/132682868/2754653.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/1/0432/6427/8686/files/bozukesidurox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/xejabumutogiluso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/rujatereboluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/australian_dental_association_infection_control_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/mupagepozotimedixotomug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/segofavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/19791174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4902/4669/files/74831372978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5041/files/22245417147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/sumejopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9060/0097/files/donogerojixorag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/wolowasogowudibus.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_off000065f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 5276 bytes
SHA-256: ae5a81f5be91363ae71c188d625ab6b085297377597e3bec56a520c21c64ad6e
font_01_sfnt_off000077f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 10652 bytes
SHA-256: b58089e7498b05420d88358adc36e32fb68a79264d9bef591638d5825088e535

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