Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef66a616ed18e05…

MALICIOUS

PDF

40.6 KB Created: 2020-08-13 23:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f2c9b8692172faf10dcd3b932bdc90 SHA-1: ce2bec4acd311565172d293ae01be7bc3076e6b7 SHA-256: 9ef66a616ed18e0513aefba6c2fe1506b27eb601d04c7a1990158463d823667f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=capistrano+valley+christian+school+uniform', which is likely a lure for a phishing or malware delivery attempt. The ML classifier also strongly indicated maliciousness.

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=capistrano+valley+christian+school+uniform
    • http://files.bobcatspanish.org/uploads/1/3/2/6/132682039/jotutofaw_gaviwuter_jesifox.pdf
    • http://sejedek.surpassyourdreams.com/uploads/1/3/0/7/130738732/wosazuduta.pdf
    • http://zabikuk.getnoticedartdesigns.com/uploads/1/3/1/3/131380213/e1950da2d1944.pdf
    • http://files.cyberedchristianschool.org/uploads/1/3/1/6/131637635/2f9dc2261e2282.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/shipley_proposal_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/kejerixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/append_matrix_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/devotchka_how_it_ends.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/27378343456.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/oxford_discover_student_book_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/couples_therapy_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/ad_d_2e_dm_screen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/canzoniere_con_accordi.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_off00005f15.bin
1e7c7425de9926b52ec5f0249eee003310245653ab30b0ee6b814e50cf28ae22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5324 bytes
font_01_sfnt_off00007112.bin
c9bf5dd7764aa12f5a1ef177186c9bdbdf7057f22c84c4b4a63ef7e741696f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 10836 bytes

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