Malicious PDF — malware analysis report

Static analysis result for SHA-256 685ea5f337da2b5d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-19 06:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bee28c031a85b4c940c1332c5bceba10 SHA-1: d86dd5c99920031d71b3dc59ab96335483523d3c SHA-256: 685ea5f337da2b5db8e4b0e36b6459cd8898253fbf149cb0e50b776abee6fdb6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to 'Bexar county jail inmate release information' and embeds multiple links. One of these links, https://ttraff.ru/pify?keyword=bexar+county+jail+inmate+release+information, is identified as a malicious redirector. The document also functions as a link farm, directing users to numerous other PDFs, some of which are hosted on Shopify. The ML classifier strongly indicates 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.ru/pify?keyword=bexar+county+jail+inmate+release+information In PDF document text
    • http://files.chukpet.com/uploads/1/3/1/4/131455158/e70dc1bc28.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/1/0460/6781/0459/files/96479804482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/pixufude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9494/0575/files/35101636768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/visoxopuzigugomuveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/zusodagujariwowizufewum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/ravipif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1137/0148/files/koguripagatosija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/atv31_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2569/3845/files/html2canvas_jspdf_page_break.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/63916970220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/59097208352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/34843983642.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_off000063a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 5324 bytes
SHA-256: 2c631a4c6ad0126ff909d5afe0bfb926ce2e8b5283dae153d6d27eec672cf7de
font_01_sfnt_off000075b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 9716 bytes
SHA-256: 2c95c8283dd8fe5727a6c8b55ebaf0a927fbc1e12571fc5341350e66718839e5

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