Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f07cedc7e2d8807…

MALICIOUS

PDF

38.3 KB Created: 2020-09-01 07:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ffdc725c8c82f80c59a6bcc5dcf676 SHA-1: 63f5c6ef24a94a769b3cf56f96abac2f38e06423 SHA-256: 9f07cedc7e2d8807f9082f2922c24761ab10c72600ef810b932c4f60f53a1f3a
150 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, a common technique for SEO spam or phishing campaigns. One of the embedded URLs, 'https://ttraff.com/wix?keyword=bota+bestard+android', is flagged as a malicious redirector. The presence of numerous links, including this malicious one, strongly suggests an attempt to direct users to harmful content. The ML classifier also flagged this PDF with high confidence.

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.com/wix?keyword=bota+bestard+android
    • https://cdn.shopify.com/s/files/1/0440/3462/1590/files/16910975312.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2137/files/43449346574.pdf
    • https://cdn.shopify.com/s/files/1/0434/8736/3238/files/choices_mod_apk_2._2._1.pdf
    • https://static.usrfiles.com/ugd/5ed537_a05b44c870e845f79a76e28a49bd1109.pdf
    • https://static.usrfiles.com/ugd/b8c837_24029676a1e841fd88e991b941f4c2c0.pdf
    • https://static.usrfiles.com/ugd/07e02c_2df0e11fec2d45989c9705e9128d14db.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/2383588467.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/39880457726.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/accounting_theory_7th_edition_godfrey.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/mexujalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0302/7361/files/accounting_standards_24.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/53462415291.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/sezozemomatow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/66993277935.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_off000055a0.bin
6035bc9f9c4c778de6d351862a32e4903d2b2307d5ea8f75b08a78af512cd0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0 4976 bytes
font_01_sfnt_off00006691.bin
99b4dd77e9a6e0bf2e3f76e9e0228656d3e1bfedb28749e05d2289be9b73de3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 10848 bytes

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