Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ee253b5c1fd2ef…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 05:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acd4ea31eb4a2f74c0cee395a059015 SHA-1: a510f7992749802e3c7abfe027a1b75bfca82f83 SHA-256: d7ee253b5c1fd2effa2458deaff8658c4129a12d3d08986370df7cd957c19d00
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=acidosis+tubular+renal+ni%25C3%25B1os+pdf', is designed to lure users into clicking, likely leading to a further malicious download or phishing page. The document body, though heavily obfuscated, contains fragments of this URL and references to PDF files, reinforcing the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=acidosis+tubular+renal+ni%25C3%25B1os+pdf
    • http://files.stlukelions.org/uploads/1/3/0/7/130776266/2101371.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/adobe_animate_cc_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/ninigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/43917516785.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/vitamin_b17_and_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5877/files/alkaloids_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/36802802325.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/55543502937.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/logo_game_answers_expert_logos_pack_4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000583c.bin
a6031b15fad1a8c722268885dcd53161c50747c4c1f9bb9a086085c8b595ebe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 5372 bytes
font_01_sfnt_off00006a36.bin
8f38aa5a5d948d74875a98251e0543a4e1439063690b37baff93a12c6a763d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 9908 bytes
font_02_sfnt_off00008bd7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7 4324 bytes

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