Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac4f187e444760f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-28 21:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea8c3c34d3c786cad631131ef12939d SHA-1: a664a07a0bf2bb3ea8d5104cfa35a1985082ff9d SHA-256: dac4f187e444760fbde6d6ad81a0b3ae22b8a6466775dcdfc0ab723cac7abe39
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the URL 'https://ttraff.ru/wix?keyword=mr+field+plus+pills', which is flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute spam content.

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=mr+field+plus+pills
    • https://static.usrfiles.com/ugd/b8c837_a749f06352934335ae43fd715734e904.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aab9125c07940f88d7cef672e60a019.pdf
    • https://static.usrfiles.com/ugd/b8c837_79f7511c81a6460597ceabda20b33dc2.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/90005376355.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/law_for_business_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/61922653382.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/28451178799.pdf
    • https://cdn.shopify.com/s/files/1/0457/8269/6102/files/1671227043.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/37762611882.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/macos_catalina_to_usb_drive.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/57694829107.pdf
    • https://cdn.shopify.com/s/files/1/0438/4518/9794/files/rijabolowipe.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_off0000672a.bin
d37f9fa4062d0740aa12ab42028bf3ec078e36ee8d08a114531827b7e7d50360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 4832 bytes
font_01_sfnt_off000077aa.bin
d0e24fbd797444de85567711c2b7fe0d94b34cba163ec328afed0ca710730a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 9816 bytes

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