Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eeaddec27a4535…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 06:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9893360f0a76ab8dea7197e8ede191 SHA-1: 4e83dfbec0a344114c2c8eabd9f58bfec2066f6b SHA-256: 63eeaddec27a4535eb8a23d072b858997429ac473736670dabb3ebf1d56017a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent URL, https://ttraff.ru/wix?keyword=r%25C3%25B6ntgen+cihaz%25C4%25B1+%25C3%25A7al%25C4%25B1%25C5%259Fma+prensibi, is flagged as a malicious redirector. The document body, though heavily corrupted, appears to contain text related to the URL's keyword, indicating a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=r%25C3%25B6ntgen+cihaz%25C4%25B1+%25C3%25A7al%25C4%25B1%25C5%259Fma+prensibi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cd79e3_05f3420ffa0f4c29991c0de19f9b9efd.pdf
    • https://static.usrfiles.com/ugd/ca32a8_240846d53980453bba96051f068abd49.pdf
    • https://static.usrfiles.com/ugd/b8c837_727865dd33a7465a8431009af0051858.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/47346736889.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/79872620979.pdf
    • https://cdn.shopify.com/s/files/1/0465/5353/0518/files/betway_app_ios.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c940acdaa34acc817d1029dd33aeb4.pdf
    • https://static.usrfiles.com/ugd/8cbfce_57cd885bfa434e9daadc64bce89e0a6a.pdf
    • https://static.usrfiles.com/ugd/0c268c_2d6c2f27dffb41f1861c9b3574bd17c1.pdf
    • https://static.usrfiles.com/ugd/d4da64_82e7e25b550b42d095328ffaa011427d.pdf
    • https://static.usrfiles.com/ugd/aef5b7_012570ff0b2541c4a1ef35b92f3badb3.pdf
    • https://static.usrfiles.com/ugd/f55bec_cee95b6d345b4dacb6300209b3f0aaa0.pdf
    • https://static.usrfiles.com/ugd/ca32a8_2be8ae65d8db46eba88d8cb236e34196.pdf
    • https://static.usrfiles.com/ugd/4dd980_7af225c40b61411ca08f26dea4ddee79.pdf
    • https://static.usrfiles.com/ugd/0aab01_488d61952e3e4232b9268607ee9d1a07.pdf
    • https://static.usrfiles.com/ugd/95089d_7d4cf2f2eb08427b990622e3517b2e31.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b9.bin
12b6ffab992bf5804706836f839c90eda7e6573f16ed66cff95b111f0a8e5437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 6144 bytes
font_01_sfnt_off00007655.bin
5bbd3f047eb5fd1e9a6375b8b13062b68f1778caa647ef4996dce07de1a47193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7655 11904 bytes

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