Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66db7885930507e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-07 15:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eae8dfe80e64a9bdaa3c47727062a2d3 SHA-1: 5b96e56eb5f6a6a3ed4edf64bd2a7ccf42b9dcb3 SHA-256: e66db7885930507e61a95a79c04d3c84818b65e12760c997dd99a8ec85982fde
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=agenda+escolar+2020+20+pdf+gratis', which is likely the initial lure. This URL redirects to other PDFs hosted on various domains, suggesting a multi-stage redirection or SEO poisoning attack. No scripts were extracted, but the PDF structure and link farm strongly indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=agenda+escolar+2020+20+pdf+gratis In PDF document text
    • http://files.sibenikmrsw2019.com/uploads/1/3/1/6/131637219/romepowiluzeloxu.pdfIn PDF document text
    • http://files.ingallsplanning.com/uploads/1/3/0/7/130776499/zazemidukajakebup.pdfIn PDF document text
    • http://files.cazooska.co.uk/uploads/1/3/0/7/130775111/lizosowegoker-buwido-muzulidigiburu.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/1/0433/8365/2506/files/cancer_papilar_de_tiroides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/vuxutezuzomawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3004/3041/files/sharper_image_dx-_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/wimawugiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/nalewegulovif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/gigajiril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/fipuwofobuvugok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/learn_opencv_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/applied_physics_1_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/biogas_digester_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/zerapozodaluxa.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 6

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_off00005e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 5584 bytes
SHA-256: 85756cc7b232c8de532315eff39186c471cafd04d15301dba0b1b3e0b4763072
font_01_sfnt_off000071ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10184 bytes
SHA-256: d5b37ba9042ce6810a28ca092dc720dfdaa3f22516408cbdb602e4e9842bb4bd

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