Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f01d6f52238e13…

MALICIOUS

PDF

73.3 KB Created: 2020-08-31 00:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a3be2e7c706410b25ad63aac180beec SHA-1: 05acc50c1850f5f673983150fc6f4a4157f11f43 SHA-256: 87f01d6f52238e13880bb73612daa00e5710614750e42c1e3d278b7f51563eea
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for a 'Marie Kondo PDF download' which is likely a social engineering tactic to get users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=marie+kondo+pdf+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5e3700100bf8468690f178499c8e90fc.pdf
    • https://static.usrfiles.com/ugd/5438e3_bff2fec23baa48ad87ead2f0267a52f6.pdf
    • https://static.usrfiles.com/ugd/efb3f0_4046bed7921e427f953b84b1d9ba2072.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/basic_proportionality_theorem_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/calidad_de_vida_laboral_libro.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/xagogawog.pdf
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/sevil.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/brainstem_function.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/14111553348.pdf
    • https://cdn.shopify.com/s/files/1/0429/3958/0575/files/dejizinopaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/brawlhalla_cross_platform_switch.pdf
    • https://cdn.shopify.com/s/files/1/0445/5052/0996/files/arduino_mega_specs.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/65790967126.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/filiduses.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/47089536716.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/amenaza_de_aborto_manejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/5079000971.pdf
    • https://cdn.shopify.com/s/files/1/0450/6569/9478/files/java_foundations_4th_edition.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd4e.bin
c0d87ffc9dfbd802484877edb438b9fed672336a79bcb0b503b2f927d26ea03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4E 5020 bytes
font_01_sfnt_off0000ce85.bin
5f5450576ed247d4bcd3538c2fcf6d0f88c9fadb4a7bfd16723cb28f24931d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 4416 bytes
font_02_sfnt_off0000da82.bin
07cd92da485b5a5edd579446924e3784eb917e27474c0f1029688f1766a90791		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 11472 bytes
font_03_sfnt_off0001011f.bin
bc7e3f6831be34686de02ce7be2a06b9f1fa2b1a298201cd6e3dc3baf4672bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 16376 bytes

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