Malicious PDF — malware analysis report

Static analysis result for SHA-256 925ae30ed28fa2fb…

MALICIOUS

PDF

38.1 KB Created: 2020-08-19 18:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a210ac76fb11b14ebf132684f49d50a SHA-1: 26267625f7a3f35c567e597d6318da980dfb821d SHA-256: 925ae30ed28fa2fbf244944579588472ab4ba9deea17e66d3ddc4feea1a6cd62
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=apa+citation+format+example+in+text', which is flagged as malicious. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic, potentially to obscure the malicious redirector.

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=apa+citation+format+example+in+text
    • http://files.thepostnatalproject.com/uploads/1/3/0/9/130969297/kesoxaseduvimej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/35211924376.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/fisobuwimanar.pdf
    • https://cdn.shopify.com/s/files/1/0436/5923/1385/files/possessive_apostrophe_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/outlook_address_book_to_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/6495100628.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/alternative_investment_fund_managers_directive_aifmd.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/pdf_to_autocad_converter_online_free_without_email.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/23836213252.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_off000058cf.bin
7fe6c045017ee418e93e8d6df0cd9065bde8b33fd43d6fc5391a21720dc67da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CF 5040 bytes
font_01_sfnt_off000069e1.bin
250d8191a0ad7ab4df2608288b1714cccd282d220bc17c31db206a984647a965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E1 9932 bytes

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