Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5b17361cdf4c8d…

MALICIOUS

PDF

53.9 KB Created: 2020-08-17 03:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 726db36b9c5a66b70dd4707006c590aa SHA-1: b77e6ba67a56777aed0c0b4425e946c859473b7c SHA-256: 9b5b17361cdf4c8df48448dc87ff12dba505d251e7cd6b0b7eca0107cac9cd06
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO manipulation or to hide malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=rational+fasting+by+arnold+ehret+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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=rational+fasting+by+arnold+ehret+pdf In PDF document text
    • http://juvowebam.procon-loe.ru/uploads/1/3/2/7/132710621/f825ba.pdfIn PDF document text
    • http://files.jenniferpolo.com/uploads/1/3/1/3/131382346/ruruvek_vedojuro.pdfIn PDF document text
    • http://files.astrologyoncall.com/uploads/1/3/2/6/132683014/fezudiden-robeze.pdfIn PDF document text
    • http://files.ambergirl.org/uploads/1/3/1/1/131164475/1862fbfb4d78b28.pdfIn PDF document text
    • http://files.populationservices.org/uploads/1/3/0/9/130970012/fdb59.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/1/0427/7560/9510/files/69974947860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/87151139162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/que_es_el_branding_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/guxoneduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/jovapaberusupikomokamira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/tepikuxuzizov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xefafozerokadugatevaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/96870411221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/18978056070.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_off000094da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 5552 bytes
SHA-256: d56ad754f8c497c1d4c194c5e27f1bca3b32d50e5503e587bb190dfc059e30aa
font_01_sfnt_off0000a7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B7 10260 bytes
SHA-256: 45742b65df98231f0f651d93337e4aad83a4fd410bae4bec8a16e7babc0bf9a1

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