Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec91bd47dbf8c578…

MALICIOUS

PDF

146.8 KB Created: 2020-08-02 10:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 424ea40cb873f3dfedd2040557ad5019 SHA-1: dba0e457b426c8cf7afd8a10bce6645e95f520b0 SHA-256: ec91bd47dbf8c578fc91b9924f893ea3d459f1a7b58aec888ef9e27b43c98f2d
134 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.cc/pify?keyword=uk+phone+number+format' is the primary indicator of malicious intent. The document body, though heavily obfuscated, appears to contain the same URL, reinforcing its role in the attack. The file was authored using wkhtmltopdf, suggesting it might be a generated document rather than a typical user-created one.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=uk+phone+number+format In PDF document text
    • http://files.sheng.studio/uploads/1/3/2/3/132302787/5644156.pdfIn PDF document text
    • http://files.fancyshihtzus.com/uploads/1/3/1/6/131607163/sobiwetu-wepevuxot-texoligipa.pdfIn PDF document text
    • http://files.wellspring-contemporary-art.com/uploads/1/3/1/3/131379312/9db8c8ce1e65.pdfIn PDF document text
    • http://files.cypressgulf.com/uploads/1/3/2/6/132695493/rupebulezonidugoz.pdfIn PDF document text
    • http://files.hamdenfieldhockey.com/uploads/1/3/2/6/132682585/rovenovubaxufasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/rufavenadafetalakux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/form_st_105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/84646427924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/18330399517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/68577775659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/dilepedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/rosijerixurojix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/46840905896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/50940349245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/fuxakofuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/67359385212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/kekuwusimulezepopuzojazud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1484/files/bomivudusavavaxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E81C 4960 bytes
SHA-256: 4a0cc83eba83c3c60169dbcb2dbfb63514cb9c861ca2dd1ea8cf6105b22ddc01
font_01_sfnt_off0001f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8C1 17276 bytes
SHA-256: fdb1d52e080c3adbf2db90dec7797e6c256121514973058baee61266ccae7055
font_02_sfnt_off00022d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D95 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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