Malicious PDF — malware analysis report

Static analysis result for SHA-256 2523725f68493eca…

MALICIOUS

PDF

34.0 KB Created: 2020-08-29 20:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a384954faafb7a557ff4b4480129fa8 SHA-1: 46ba4bfb17cc3be1283fdeb9a2b5eee83744962c SHA-256: 2523725f68493ecadbd2e876574bbafdc6417d2e09b30c9b5d14eac851c3c363
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, a common technique for SEO poisoning or link farming. One of these links, 'https://ttraff.ru/wix?keyword=essential+concepts+for+healthy+livin', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a lure to a malicious site under the guise of providing information.

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/wix?keyword=essential+concepts+for+healthy+livin
    • https://static.usrfiles.com/ugd/b8c837_7a45e558f3324f9fa88b2b70a111708f.pdf
    • https://static.usrfiles.com/ugd/83e24f_92aa43d9c2a746f9b191b1ea79451d0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_47cf9e6eac244b3f9003590006603f2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceb7b271360e488e863b26e28043d87c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8cb9ea401404c31bd09e45a5a2ed76b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f2d3a8e00f4a29adb9ef6f804fe0dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f825cf65625495496c79e78b526030c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5b233dc73fd4a88a304364b1932c1ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c185d7ccd894776b529c4e875233a88.pdf
    • https://static.usrfiles.com/ugd/b8c837_de65114771cc4a4da31b3019933ad817.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/76265326438.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/daily_attendance_sheet_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/nabobekisetiziju.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_off000048f1.bin
4590a5443588a065f84514e78ec9e559fd2a672c450c6571bcd3fb42407b1b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48F1 5224 bytes
font_01_sfnt_off00005aaf.bin
76a38d8ed2d739dd007cfaf0e1a8b034152a1529f0c20103799a72bb977e0fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAF 9520 bytes

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