Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82508c97f5176c6…

MALICIOUS

PDF

37.0 KB Created: 2020-08-15 03:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42db89918f54d748d3c80213cef7b9ce SHA-1: 222ab03b8bfaf6610eb082f23866d873fdcaafab SHA-256: a82508c97f5176c619e7ec6fc523ab1c9b73b7e82d3bb72f2aed1fdccd3bc910
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bookman old style italic font free' and a URL that matches the malicious redirector. This suggests a social engineering lure to trick users into downloading a font, but instead directing them to a malicious site.

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/pify?keyword=bookman+old+style+italic+font+free
    • http://files.howieheld.com/uploads/1/3/0/7/130775528/2098174.pdf
    • http://files.lifemissionmanteca.org/uploads/1/3/2/8/132814589/9377771.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/mariage_d_amour_easy_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/4698703859.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/sinuzoxif.pdf
    • https://cdn.shopify.com/s/files/1/0438/4092/9957/files/convert_mdi_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/23622322028.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/pevoxatidorusamigema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8173/files/28764693078.pdf
    • https://cdn.shopify.com/s/files/1/0448/9605/9547/files/business_for_beginners_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/compressed_air_tank_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/jefapuditolaxoxivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/62521742113.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/laxafurerate.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_off00004cb6.bin
66b895e32473f1f695ed4a9284f5062ae5b157d9bafd8ced1e705b8d3129cfcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 5384 bytes
font_01_sfnt_off00005eee.bin
d738fb02b964ea4af2e3bc008a174d79270a6d7d9b5262e6f04a1756619f70d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 12348 bytes

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