Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57824c6c59ec2fd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 04:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 936bb16dae0ee564a06ba462996f14c0 SHA-1: 3b3992185d970327a4040a8a65545ba0cd2cd5fa SHA-256: f57824c6c59ec2fd1c20da2fffffe3ba15979da219c62e28f9932820386eabd2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. This URL is embedded within the document body, disguised as a search result for legal documents. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify-hosted PDFs. The primary malicious link is https://ttraff.com/wix?keyword=livros+de+direito+do+trabalho+pdf, which is likely intended to redirect users to a malicious site.

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=livros+de+direito+do+trabalho+pdf
    • https://static.usrfiles.com/ugd/b3bc21_a1ef10c835a94842824c9673fa4b1afb.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_7e17edca8ac64a769a66a769587cacd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed90f2a3be8542cda28f486d9cbf2f16.pdf
    • https://static.usrfiles.com/ugd/de3d83_efaa247b7ab440328ebbd06d78c10c36.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_b785ac28fd7645bba3167db2226f8fea.pdf
    • https://cdn.shopify.com/s/files/1/0460/4192/3748/files/microsoft_word_table_of_contents_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/50427859732.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/29701563004.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/kowidetuzivawuvebebim.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_90b11a2c116042f5b30805f5dd6b1b9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4917f297d20a4dd0baf1abf9dc07065d.pdf
    • https://cdn.shopify.com/s/files/1/0434/7684/4694/files/lufazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/jonebomag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/xazid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/misovifu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/65162976443.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_off0000632a.bin
bb28f3c1972bd00605d5165143c1b80b336a805418b82b9660e2465303897e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5272 bytes
font_01_sfnt_off00007510.bin
f9b92f5422a430657a77212f405d0b464aaa0069e89bd716ff59734fe962cf39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 11784 bytes

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