Malicious PDF — malware analysis report

Static analysis result for SHA-256 478d5117a8c72e7c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-16 20:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32483927d7b9547b4e6b8b30e2386c2 SHA-1: c0b3c370210022a7747b99ce2246bafb49fbb7c0 SHA-256: 478d5117a8c72e7c0b7fbfde4d53db78c92a95b9973b6d76caf1d67ee70cf5a7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO abuse. The primary malicious URL identified is ttraff.ru, which redirects to a keyword-specific URL. The document body contains garbled text but also includes the same URLs, indicating they are intentionally embedded. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=catalasa+en+alimentos+pdf
    • http://files.yournewhomepartners.com/uploads/1/3/0/7/130738803/8017c44412c8.pdf
    • http://files.industrialcommercialdomestic.com/uploads/1/3/1/3/131381946/43ae92f4f449b3a.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/trance_vocals_samples_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/74581900941.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/36338174450.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/jutefewizakisezifagesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/72950838136.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/bazajumobunidival.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/3d_gun_models.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/detubitajex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/suferowamatidatafuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/depepune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/4839594334.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_off000078bb.bin
7a7560b8d0eb87d183348c823ec926421c8cb77a3cea2005f3b3c43cbee15cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BB 4996 bytes
font_01_sfnt_off000089a4.bin
1920b2dcec72fadf17b119fdb86b76b7af66282ef3165a01488ad48ebae99a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A4 11216 bytes

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