Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9b229d67bb4b49…

MALICIOUS

PDF

61.2 KB Created: 2020-09-01 02:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9981e2ee722d4d8a38928f45559367d SHA-1: 090ea76bb994759f4782508427aeeb4d0c985f4e SHA-256: 6d9b229d67bb4b49ce04efe1e0e66d1bbf4e3008b86b3eae5f1e3744e2ee6d73
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure.

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=movimiento+rectilineo+uniforme+ejemplos+con+graficas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_5ba32c53e07e478bb5d9789dcc64f4a8.pdf
    • https://static.usrfiles.com/ugd/808d8c_08b3b981b5e145b8898f6bbf49b5bd51.pdf
    • https://static.usrfiles.com/ugd/e6092c_8669a3a01407470f9cb8d31ffa09fe43.pdf
    • https://static.usrfiles.com/ugd/0d002d_f5b1786ffa5445f5930280734e235ec1.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_64792ac13c9741b0a4b31450f1aeb5e8.pdf
    • https://static.usrfiles.com/ugd/ef253e_01887db1d5ed462798c7c85c1a9cb903.pdf
    • https://static.usrfiles.com/ugd/e73fea_ff08e89c95ed4de39090fe8e8b6d125e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e12eab74c3741468d414bf142807c97.pdf
    • https://static.usrfiles.com/ugd/83e24f_0c5f96ef8bde4612a39a9e200cadc915.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce054c7d533441bb908d312701f67b71.pdf
    • https://static.usrfiles.com/ugd/6cfc61_93679de566c440a29c739f89c2b143b8.pdf
    • https://static.usrfiles.com/ugd/12daa7_6af462ab97bb4257b9430787060d156f.pdf
    • https://static.usrfiles.com/ugd/de65f7_347f4f93d9784387b25c2f98b47df79d.pdf
    • https://static.usrfiles.com/ugd/3e5d97_2f529506ae914100b1ccce31c07a4a19.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a2b.bin
e6f48647ac67c2baaf7fa6c2ae732729d69e8931196ed8f9552d474055623df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2B 5360 bytes
font_01_sfnt_off00008c25.bin
6ba9c028658465bbd0646dcf304a0e2c6e9c8ddd62f3ae8a3c7957fb7a696395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 6300 bytes
font_02_sfnt_off00009b7e.bin
6e2221b4729f9ec399b74a4086b6b43cd339e2d376cd704580036eb7778ecc16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7E 11636 bytes
font_03_sfnt_off0000c18f.bin
5355995778af6fea050508ce4debc46bc2ba7deab687ac039556469e1bec84fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC18F 16064 bytes
font_04_sfnt_off0000d630.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 4324 bytes

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