Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9c2c4dc27e77d3…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 12:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca0df30bbb95ef811bb89e858769dbf3 SHA-1: 5432fe547277f80c630350b43506b2595d86d1d6 SHA-256: cd9c2c4dc27e77d39b53a54b2f0f4c80547c25eef0cdfdce6d72b77d355a84f9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=tennis+elbow+exercises+pdf'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme designed to lead users to 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.com/pify?keyword=tennis+elbow+exercises+pdf In PDF document text
    • http://files.h2020-tutorial.net/uploads/1/3/1/4/131483209/2383322.pdfIn PDF document text
    • http://files.pravdapromotions.net/uploads/1/3/0/8/130874329/vogevevabuvuzuz-pomukotidedul-zabutopig.pdfIn PDF document text
    • http://files.nomadnubians.com/uploads/1/3/1/8/131856200/nijaxopezuxekel_gitikovolimi_nabogu.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/1/0430/9506/4730/files/28178684152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/nivozega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/fujopopibewitufel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/vazotiwigojasuradewokugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/advantages_and_disadvantages_of_captive_insurance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61403973964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1427/3698/files/82090060342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/12360026093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/39126169769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/serenade_schubert_liszt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0884/8035/files/32237674984.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 7

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_off000068bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 5188 bytes
SHA-256: d3874a73ccaecf2487b9fa0893d0a18d0444021261499c930496514f0f6a7e53
font_01_sfnt_off00007a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 10232 bytes
SHA-256: 2c84f78336e2f839c57b33e7b1fbfda1b2921115b685b378b13da84405a7026d

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