Malicious PDF — malware analysis report

Static analysis result for SHA-256 951c05d816b80a9e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 07:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0b9b5fbd130eeea3d5bbf0f29d01d6 SHA-1: e650564b4e001f6be1f0a80f6556aebc99ea4a83 SHA-256: 951c05d816b80a9e320225ddc90580fb1048f8c71d09349a735d77f5f16b7d11
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=experimental+techniques+and+instrume'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF link, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.ru/wix?keyword=experimental+techniques+and+instrume
    • https://static.usrfiles.com/ugd/0511f5_2e9069cb98bc43e4a79eea0f3b3aee0d.pdf
    • https://static.usrfiles.com/ugd/0e2875_74b198a7ba7e43f99212112384effdce.pdf
    • https://static.usrfiles.com/ugd/3f0e57_b4d29e2dfc894490ab36994125ca9829.pdf
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/jozovedodapudolaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/98311960619.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/razumatokagevozalipitase.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/nixedagatagekijujowififap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/jemiselijiliditosekaverip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/62257109320.pdf
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/analyzing_data_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/76758406624.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/58152445759.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8440/files/35178770146.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9575/files/warotefoneros.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_off000064c9.bin
148fba71ebd927f6cd3b525ee24e09a4a52c0a65aad8a01412a07ab7e2158a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 5464 bytes
font_01_sfnt_off00007726.bin
eb48b1f68b994a766a70b3584b90cdcf820e7f90f39dbf718cdf4fa42cdfc870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 10580 bytes

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