Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bbba8bcc1ea5c4…

MALICIOUS

PDF

69.0 KB Created: 2020-08-31 10:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc93905f7aa34b3508747c93d81f884 SHA-1: 39d649751e7793abcbe4d586efa82a628018c2ae SHA-256: 58bbba8bcc1ea5c49fd8fa81768e12b57aeca3282b753c12e358166e8c98ec41
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a lure related to a car manual, but its primary function appears to be redirecting users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates a direct link to a suspicious URL, and PDF_SEO_LINK_FARM shows it's part of a larger link farm. The ML classifier also flagged it with high confidence. The embedded URLs suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/wix?keyword=manual+chevrolet+sonic+2015+espa%25C3%25B1ol
    • https://cdn.shopify.com/s/files/1/0463/3116/6881/files/music_maker_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/34401141799.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/70466029838.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a5292da23ce48898edcd08b9f4abffa.pdf
    • https://static.usrfiles.com/ugd/078c79_eb46f264d0d1418cb7fa8ed93c86b4a0.pdf
    • https://static.usrfiles.com/ugd/764aaa_11ca9eecb4de431383dacecdd33fd30f.pdf
    • https://static.usrfiles.com/ugd/33a16d_5774c755e93946128d5aebe97bfc7960.pdf
    • https://static.usrfiles.com/ugd/a48928_c8ebcdc834c947cf8f2f3ef4aef16c12.pdf
    • https://static.usrfiles.com/ugd/b8c837_94d470aa8a85454dba561d3bc5e01775.pdf
    • https://static.usrfiles.com/ugd/90c678_8790e8f4f3e04092bbb1e56b11007336.pdf
    • https://static.usrfiles.com/ugd/9e14ca_93ca29edcb5d473eb3cbacc861d11ef7.pdf
    • https://static.usrfiles.com/ugd/9dda13_745e796245f14b6fa09680e6814fce34.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b44f289cf9405e9b6eb01e7ceb64d3.pdf
    • https://static.usrfiles.com/ugd/4f270c_18a7e5c7ee934b7780439433966c1905.pdf
    • https://static.usrfiles.com/ugd/429b25_5ee164b68ed848a3a639825812676c96.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ae.bin
dc61cb57a324ec1c06774c726339d587bf69ced6fb48a6031048eec867a7418f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AE 5748 bytes
font_01_sfnt_off0000d803.bin
78a3fe04fec000004c985e029e04fdc4ccedf5c93068878dd5476f7a9dbc8b3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 14532 bytes

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