Malicious PDF — malware analysis report

Static analysis result for SHA-256 de23151fb509bfd0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 15:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c374426cf490fc1fe54fcf8c12cbd205 SHA-1: 213d9bc4f658d9b63e03dd2bb1b6586fcbd78d40 SHA-256: de23151fb509bfd0fe5dedb6dd491469791e508be1a4dfe496629ead7cdcad94
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.ru/pify?keyword=catholic+social+teaching+book+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary lure. The extensive list of embedded links, many pointing to Shopify domains, indicates a potential SEO manipulation or content distribution scheme.

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=catholic+social+teaching+book+pdf In PDF document text
    • http://files.tracychamberlainstillman.com/uploads/1/3/2/3/132303310/9320510.pdfIn PDF document text
    • http://files.fdryabc.com/uploads/1/3/1/4/131438471/depiworuku.pdfIn PDF document text
    • http://files.westsillawarrasnooker.com/uploads/1/3/2/6/132680926/4547313.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/1/0429/6137/1290/files/12745503007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/bibiverigole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/xewulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/76090097765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/environmental_biophysics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/jafamobetavajubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/zelevipubodekimeluju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/72249109651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/67486966155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/85767307381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/14695943342.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 3

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_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5432 bytes
SHA-256: b3ed5352b643a0628e9d0743006141936f64b0e35907bd0a4b48337124939a58
font_01_sfnt_off0000759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 10256 bytes
SHA-256: 3896981723d8d0cd9857eeaa06cd44438bb23fcd1ba6e7542f712c3ec7ce248f

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