Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdea7e6cf321ed8f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 09:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2b13ff87c84070a106d781e528b085 SHA-1: 8d7c8ad78f723a6db5f77dda4597fab14a5c0f2d SHA-256: fdea7e6cf321ed8f21358d9678da4d18ff9567c254ad4631579ea237b6221af7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=amplificateur+diff%25C3%25A9rentiel+cours+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a lure to download further content or redirect to malicious sites. No scripts were extracted from this sample.

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=amplificateur+diff%25C3%25A9rentiel+cours+pdf
    • http://files.caworkingdog.org/uploads/1/3/1/3/131380848/fobosi-bofakumutafot.pdf
    • http://vomojipo.intheam.shop/uploads/1/3/1/6/131607029/wabaxig-fagut.pdf
    • http://files.woodyshticks.com/uploads/1/3/1/3/131379612/ritozo_luwubuvilul_bizifodoli.pdf
    • http://files.ecosphererestorationinstitute.org/uploads/1/3/0/7/130776295/sumamerako.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/wafol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/24726254882.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/kakijejorarut.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/65076038267.pdf
    • https://cdn.shopify.com/s/files/1/0429/9148/5091/files/72667171235.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/6905734146.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/1657763704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/30571079915.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/coreldraw_graphic_design_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_off0000636c.bin
196bc4d22021f183256ae8585717bde094ae13c1fe797c00e18ba3dc8087e9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 5432 bytes
font_01_sfnt_off00007591.bin
264c868e1d719a5a41d0e9a917fcb2721cadf3ab11b02f4fbd695a19ff95b17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10812 bytes

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