Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca5b19d10a23644…

MALICIOUS

PDF

42.8 KB Created: 2020-07-29 03:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8dbd3a21694f7868c083346513ec6a48 SHA-1: 6d12e344e0fa7c758a35c515045aca4bdc2f2543 SHA-256: 8ca5b19d10a23644a3321971e76faf26427fe1ffdc138ca9cfc0b50de4e04d62
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, ttraff.ru, is identified as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to the embedded links, suggesting a social engineering attempt to drive traffic to malicious sites.

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=coroners+reports+online+uk In PDF document text
    • http://files.lordoflifelutheranrc.org/uploads/1/3/1/4/131407214/raved-wupenowobikex-fuwozivesaz-sasozefozegoval.pdfIn PDF document text
    • http://files.audreynewmont.net/uploads/1/3/0/9/130969878/98466edbfb.pdfIn PDF document text
    • http://files.trancityevent.com/uploads/1/3/1/1/131163777/4133409.pdfIn PDF document text
    • http://files.sacredspacehealing.net/uploads/1/3/1/8/131872138/lorijuremurevufisir.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/1/0434/4889/3606/files/mamibuvubazonuwegineredav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1356/9687/files/kufurewekamojudobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/81053224241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/33091034791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/24647349506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/6006/files/ketemazamozuwed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/75159559243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/godivoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/silul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5370/2550/files/2318775100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/dekojodoxodugezeluduwog.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_off00006ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 4572 bytes
SHA-256: 7b334548f5515de569bd15f8ef53aa7a18a9d8864fafa7e9866770d4fec17866
font_01_sfnt_off00007c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C80 9816 bytes
SHA-256: 0c740b3ef9c0138500e6277535840ee7240ed943741eed21a08974c5384eb44f

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