Malicious PDF — malware analysis report

Static analysis result for SHA-256 a535ce6830336cc9…

MALICIOUS

PDF

66.8 KB Created: 2020-08-17 02:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8aad715d287ef7f1e9fb42a262b8e6c6 SHA-1: d1c8f1b4ded79d9599ef76c4bb27b6c7d0edce06 SHA-256: a535ce6830336cc9c79de5ead878eecab928806868d2002300cf4ab8843e05a3
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, indicating a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title related to skin cancer classification, suggesting a lure. The presence of numerous links to Shopify-hosted PDFs further supports the link farm heuristic.

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=clasificacion+del+cancer+de+piel+pdf In PDF document text
    • http://files.fuelyourvibe.com/uploads/1/3/2/6/132682585/31f5b3cbe0.pdfIn PDF document text
    • http://files.lighthouseyarns.com/uploads/1/3/2/8/132814791/2243958.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/1/0439/6272/8606/files/nomawumogadatozekunope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/bojedavomuxitafizoragu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/38014918516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/xonuvexokilesonalerokufil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/ronufeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7985/9366/files/24742452552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/analytical_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/83552858139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/5627267254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/microsoft_word_2007_tutorials.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 2

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_off0000c52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 5052 bytes
SHA-256: 255a031f75e1a69b702646459076049600bd6142be425545c73f497c609b104e
font_01_sfnt_off0000d664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 11636 bytes
SHA-256: b327fb8c6c31fdde421006d93f1a5e8bbd6be206ebee370ca04a780f977bc4da

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