Malicious PDF — malware analysis report

Static analysis result for SHA-256 77df1b1d2c960d3e…

MALICIOUS

PDF

47.1 KB Created: 2020-08-22 00:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d8439031e46a1450280099f6d7b1a40 SHA-1: c199b68df5129313661638d885b7fbf0cd0b3024 SHA-256: 77df1b1d2c960d3e280ca112a45c4b5025b67f27466a95bc0964ca7410cb715a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/pify?keyword=case+animatronics+2', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous Shopify-hosted PDF links suggests an attempt to obscure the malicious redirector behind seemingly benign 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/pify?keyword=case+animatronics+2
    • http://files.keriboothe.com/uploads/1/3/2/6/132681544/joligobezutad_vitusevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/tewopubipalavojeraj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/ruzaraligavurukip.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/mowofevefomopozuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5190/9274/files/46354308049.pdf
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/az_100_exam_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/khutbah_gerhana_bulan_bahasa_sunda.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/merafelofopugikakuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/begixubar.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/ap_grama_sachivalayam_jobs_syllabus_2020.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_off00007c31.bin
0c248941b6b62c8fc3ebae15d5c8e29d2b2f09ed25fbc0eb312ed6f3b1718493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C31 4948 bytes
font_01_sfnt_off00008ce7.bin
c04705a1f74cb3e5cb3fce560dacda29d848999ee8c85df36002a6631ea0eb99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE7 10156 bytes

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