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)
MD5: 8aad715d287ef7f1e9fb42a262b8e6c6 SHA-1: d1c8f1b4ded79d9599ef76c4bb27b6c7d0edce06 SHA-256: a535ce6830336cc9c79de5ead878eecab928806868d2002300cf4ab8843e05a3
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.fuelyourvibe.com/uploads/1/3/2/6/132682585/31f5b3cbe0.pdf
    • http://files.lighthouseyarns.com/uploads/1/3/2/8/132814791/2243958.pdf
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/nomawumogadatozekunope.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/bojedavomuxitafizoragu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/38014918516.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/xonuvexokilesonalerokufil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/ronufeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7985/9366/files/24742452552.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/analytical_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/83552858139.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/5627267254.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/microsoft_word_2007_tutorials.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52e.bin
255a031f75e1a69b702646459076049600bd6142be425545c73f497c609b104e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 5052 bytes
font_01_sfnt_off0000d664.bin
b327fb8c6c31fdde421006d93f1a5e8bbd6be206ebee370ca04a780f977bc4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 11636 bytes

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