Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa22d71ac5455f28…

MALICIOUS

PDF

49.6 KB Created: 2020-08-21 06:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74d8920008677d684369a5ae185f3f4c SHA-1: 66a1393455b30149f87e54a3ae0a6cb2026edaca SHA-256: fa22d71ac5455f28abc5299285d460df649a0bf42c4aaee498bb78c12539c632
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sample+answer+to+job+interview+questions'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting this malicious link. The PDF also contains a large number of external links, indicating a link farm or redirection strategy.

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=sample+answer+to+job+interview+questions
    • http://files.kimberlyrogers.net/uploads/1/3/1/8/131856158/gifonagefexoje.pdf
    • http://nofiwazo.lebanonprayergroup.org/uploads/1/3/1/0/131070786/4b9ab26.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4629/files/libro_1000_bosquejos_para_predicadores.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/84989046275.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/tapulodufew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/sumujodofuxusuzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/wasowudopekuvewe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/sagarimifalalufagena.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/58987325102.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/ahsanul_bayan_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/27981183650.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7923/files/discovering_geometry_answers_chapter_4.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/
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008225.bin
cbdc95fa52f01b0fae58b9c00b63f0bdefac7fddb94c646ce559fa20dcafe26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8225 5560 bytes
font_01_sfnt_off00009508.bin
810227aba6a1ec5a3a173754e1afdbecf8fa5ed389088afe4ca4d2fbea7090c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9508 10628 bytes

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