Malicious PDF — malware analysis report

Static analysis result for SHA-256 183a564eb0fcd828…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 21:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ab411b9101924e4bc9639d9e7f4901 SHA-1: 3362da8549c29893c69c4e4b6ce4cffe4400f1f8 SHA-256: 183a564eb0fcd8286ceb12e2c5485c23cb6a9e4f382096b718fc1ee7284d0d36
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that mimic a software download lure, specifically for "brasfoot 2019 premium apk download gratis". The primary link directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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=brasfoot+2019+premium+apk+download+gratis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_b1a85a9cf1094f1186ccc391cb7bf560.pdf
    • https://static.usrfiles.com/ugd/73cb9e_eb79d8b02d6c4c4ab0f1ec7cda2cfa6e.pdf
    • https://static.usrfiles.com/ugd/628a76_ee816adc39d048aebe9b07ef0f118b4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccb8a125ba5a459f8f601b6bfbbbc0f4.pdf
    • https://static.usrfiles.com/ugd/724bd4_93bfab97d07e4f0282ae0e8c1a5d2ef5.pdf
    • https://static.usrfiles.com/ugd/fb83f1_7230bb564a5846ae9e1180e78b047ead.pdf
    • https://static.usrfiles.com/ugd/8ab72e_273c06660a784a619f793011c425189b.pdf
    • https://static.usrfiles.com/ugd/b8c837_40fac45572904770b6423b61e4f8c578.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_776365da7b334ed0bdfe94670a83cc46.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_8c881b6a273b45048b0ef8e8abaf8591.pdf
    • https://static.usrfiles.com/ugd/b8c837_3597cf08ea504c5a946ef107cd30785b.pdf
    • https://static.usrfiles.com/ugd/0a593f_7367f4c3da3e48429bd8abb45a56f052.pdf
    • https://static.usrfiles.com/ugd/3b47cb_eb117166af6547f9b81b7ab7357fbddb.pdf
    • https://static.usrfiles.com/ugd/64d889_3e5170da56474b2f861bc7bf2916fa00.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2625a7e61a4579bda86eba1321fff8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052c6.bin
25cfe32b81c6d0bcec08b2243444e612f3db6d1c70e031721f95c5f9e7b6a14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C6 6048 bytes
font_01_sfnt_off00006757.bin
96ad254e3cb07793ea72aeb5aadc6a134961d5bbd11137ee3c1c19d7ab737e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6757 9144 bytes
font_02_sfnt_off000079fc.bin
5ce1063dc90d0a3309de75619470c148dd3972a5e1a9ff54899929355d666292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 10908 bytes

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