Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad756f4b02e308a…

MALICIOUS

PDF

43.9 KB Created: 2020-08-23 02:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2787de4d04b5253695f20f1172b286ef SHA-1: 5efaecd429ef4d1b61379a9956696090269527c6 SHA-256: dad756f4b02e308a14c87b9d72f3b0b5dafde9f9264aa7e728803fd3c2d79494
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'uipath foundation certification questions and answers'. The presence of numerous Shopify links, many pointing to PDFs, suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=uipath+foundation+certification+questions+and+answers In PDF document text
    • http://files.kreutingerpuppets.com/uploads/1/3/1/4/131483279/jareduzezipoborag.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/1/0428/7240/6179/files/9610337715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6185/7695/files/nadarijibexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/pidemiritiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/64590412093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/subetamirubidonotowisixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/lujavadozubexogazezog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/74711740217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/mikhail_bakunin_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/pifaraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/cake_decorating_tools_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/gta_sa_hot_cofee_mod.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 1

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_off000069e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E8 5420 bytes
SHA-256: d8c524cae514ca503d20d7530fc257df8bb8fa5097b61bb9c12e2480294557ba
font_01_sfnt_off00007c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5A 11200 bytes
SHA-256: 9c739c9be9ed4c73065fa9fa0d7e947c85e1f292f0a10c530e6848b7f6195577

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