Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f131844b0bba6f7…

MALICIOUS

PDF

47.8 KB Created: 2020-09-02 05:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00dee274f506720e0f7328903820e5b3 SHA-1: dee642395ad40b20ba47ea31372a4c9bf03a6588 SHA-256: 2f131844b0bba6f7853e4d4c5ce73a8989aca065c9a5b68c91fdad6dd4ee19ea
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=catequesis+de+bautismo+para+ni%25C3%25B1os+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains fragments of the malicious URL and references to PDF content, suggesting a lure.

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.com/wix?keyword=catequesis+de+bautismo+para+ni%25C3%25B1os+pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/o_caldeiro_azul_marcelo_gleiser.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/scert_telangana_text_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/gitakegev.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/anthropology_books_in_bengali_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/gubusitiketonikip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/free_b_boying_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/0722/9597/files/tidixefa.pdf
    • https://static.usrfiles.com/ugd/07625c_bfc3590ff5f9489682399bd2f130929c.pdf
    • https://static.usrfiles.com/ugd/b28561_e291c4d868374a499b2796e3cdae4260.pdf
    • https://static.usrfiles.com/ugd/808d8c_1a2452aa964440e09dd3c3dc0edada24.pdf
    • https://static.usrfiles.com/ugd/b8c837_67fa9f2ab43b454c8b44ae1f1fbec365.pdf
    • https://static.usrfiles.com/ugd/4f270c_175d8e4067cc41b5b14f50c0abd18565.pdf
    • https://static.usrfiles.com/ugd/b8c837_33284a30091f4077a062a2edbcfe5c9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1dbbfb8f8a042a18d05d0f8565bf543.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_off000078ad.bin
1631be2cbf44269bb982532aec6d4361199eb3eb91ce3f3f80d9bb081b76ddad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 5536 bytes
font_01_sfnt_off00008b19.bin
48f0c8e4c9b7893093c3c142ef21307e85dafe0cdbacc56e727e820ebdaa4cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 11208 bytes

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