Malicious PDF — malware analysis report

Static analysis result for SHA-256 40521ea41f1875ed…

MALICIOUS

PDF

44.3 KB Created: 2020-09-02 05:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be82c0d12e9631df0af811cd1d147dee SHA-1: b9875ad7c67d9fad4b214392fa9ed9772f8c0493 SHA-256: 40521ea41f1875ed476e65fe48a4bcf71d17248e0ae524230e8fcdd01d5a7f4a
160 Risk Score

Malware Insights

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

The PDF file contains a social engineering lure, instructing the user to install a browser extension or update to view content. It embeds multiple links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect, suggesting the primary intent is to lead the user to harmful content.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/wix?keyword=emulator+game+android+pc+paling+ringan
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/9490682112.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/tudujuxujenivorapoga.pdf
    • https://cdn.shopify.com/s/files/1/0447/3035/1770/files/hernia_epigastrica_congenita.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3061/files/adobe_reader_for_windows_10_offline_installer.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/cardiopulmonary_resuscitation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/82474817306.pdf
    • https://cdn.shopify.com/s/files/1/0438/2228/4960/files/getigumizegepa.pdf
    • https://static.usrfiles.com/ugd/02beb7_d38f8d6db35c4a5696bc1e8b02ae1e22.pdf
    • https://static.usrfiles.com/ugd/e5a943_5a950b3f64ea4f688ed405fd7cd1652b.pdf
    • https://static.usrfiles.com/ugd/a467d2_5f8711f60cda4b2f8b2baf10007e90bc.pdf
    • https://static.usrfiles.com/ugd/1cfe37_7d0fdf1aae5c42369c2e171443c11422.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_off00006f1f.bin
5255ad8e99e40dc2ee70906a2a347f48a2de2f96caa187b17e15b2c6fc0c14a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 5172 bytes
font_01_sfnt_off000080a4.bin
17f87b40883ddc207a4cd431852d3b7f595883fd5f4d8d9c4bfeafa6cb51fdb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 10672 bytes

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