Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a8a90718bd50c3…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 18:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69bbc9c7cc79f225a2212d2fc93bce26 SHA-1: 78160554f2578718c71702748f9e76c4947f06b9 SHA-256: 96a8a90718bd50c3b55ad132feb230e2b407e5106da4662a11914f4007ff27be
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a PDF download, specifically mentioning 'Robin Hood' and including the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=robin+hood+oxford+bookworms+starter+pdf In PDF document text
    • http://files.neurosportchiropractic.com/uploads/1/3/0/8/130813827/ca9344a3275.pdfIn PDF document text
    • http://files.ibstudyskills.com/uploads/1/3/2/6/132696263/vopajuwe.pdfIn PDF document text
    • http://vaxeva.northbrookumcpreschool.com/uploads/1/3/1/8/131856158/misomarabozi-wusefubukajoxam-xazaruge-kanabiva.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/1/0434/8307/0629/files/11001309596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/sepifagarigigexilugakimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/14781279814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/9400452343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/govakox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/dikufotikiliwajojuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/wevefigubomojanad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/mathematical_puzzles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/business_process_reengineering_articles.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 4

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_off000077dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DC 5620 bytes
SHA-256: ff08e1746f736e15915c971e2526408926e68553459bf71ab4f543c6455609eb
font_01_sfnt_off00008ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD3 11196 bytes
SHA-256: 0aad0b05cc8977d0cf12adaa6731d95faeebb4f901bbf706bab6d33830183cc5

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