Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc49397b6a15c8a…

MALICIOUS

PDF

46.6 KB Created: 2020-09-01 10:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b864a5a47e93eea74e47b5089b9c7cf SHA-1: 175ee177bff8c81471434a2f9dd5dafc54f138da SHA-256: 5cc49397b6a15c8a002e27dc22beaac4bf4c1b6458d120c9017742f79b0c0a00
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise its true nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=country+western+birthday+invitation+templates+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/7d1dc9_91840ad8e2354d5c986913759ceac2c9.pdf
    • https://static.usrfiles.com/ugd/5360f8_643799529d184c958f75310d432fb95c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab90a2c16934972befaab0793c90418.pdf
    • https://static.usrfiles.com/ugd/b8c837_37dda59325b84745b1f6d33c61e9f468.pdf
    • https://static.usrfiles.com/ugd/26481d_6070727657ab44c38b59fb55b07dccdd.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_58169474ded6434c975831872303770a.pdf
    • https://static.usrfiles.com/ugd/c1615c_04b8233201374e87801b5c13b4ba9f91.pdf
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/vaxezogijama.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/54421921345.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/88490504102.pdf
    • https://static.usrfiles.com/ugd/2c8d66_cbc434821ba84523b74d4b6583db3ee3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cebcae217b434ea6de0aeef9b1e0b3.pdf
    • https://static.usrfiles.com/ugd/cb2bed_d1771e504dcf4ac6a6fca26b3544d6eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_63e69173a194444a94af18c03d77571b.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_off00005fd1.bin
93e9bd89f2e6ed32dcc62baf1f9ccd9a654a993238f049638cf1d24ecebb9ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 5580 bytes
font_01_sfnt_off000072b3.bin
f52f8b9347c933894ec7653069261c87fab1c7868c8b532fc676e73dfb31db19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 10452 bytes
font_02_sfnt_off000096c7.bin
4972c892cf783310df7ebe7a43044f7b4e4d650808add06809858f2f0e6eeb09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C7 16448 bytes

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