Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde9e6efd0571ee3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-16 16:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a0810f47cd5928678c4d9870848913 SHA-1: 9a0a1eada25239bc6868678f0e0d05c77f456a4d SHA-256: fde9e6efd0571ee3d3d930a32ad14a7f8cafd29ecaa04aa109cf7a3a919c8be0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link-farming or SEO poisoning technique to lure users to malicious content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly indicates a malicious intent to redirect users to harmful sites.

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=drawing+fruits+and+vegetables+worksheets
    • http://files.realtorblogging101.com/uploads/1/3/1/0/131069906/4ae360c3.pdf
    • http://kelonove.n58.co.uk/uploads/1/3/1/4/131406082/8651701.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/83386714412.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/review_sheet_38_anatomy_of_the_digestive_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/39394094626.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/wovilemud.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/blue_sky_white_stars.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/mupabokeseperawizovef.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/zoology_lab_manual_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/3887261911.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/kikiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3507/files/23882356789.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/5777322552.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_off0000652e.bin
8657a2cd92802a9f32dfd000d1593110641da030ddc16f5e82d5cc357131917c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 5524 bytes
font_01_sfnt_off00007803.bin
a7730d44ed3c9f5e6bd59fe543cb82cf26ea94f6dcb6db4344debec6f5fc77af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 10224 bytes

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