Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4b6c3c02efc662…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 02:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cff5e5a8a8f9ac22d322a8d41bbd55 SHA-1: 9ee057465c0673ab940c7b7dc3f7c194f5698582 SHA-256: 8a4b6c3c02efc66299e366afcf87732554a897371ad141e316148f14a7c2b440
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, presented as a link to a 'Durham bulls schedule 2018 pdf'. The file also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is flagged as a link farm. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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=durham+bulls+schedule+2018+pdf
    • https://static.usrfiles.com/ugd/6350c7_7e16be0560b14da2a7dd10b2e6ee7211.pdf
    • https://static.usrfiles.com/ugd/11f207_52464a38b5ae4ea18008d9b4f1c9b1a8.pdf
    • https://static.usrfiles.com/ugd/b7306e_1e40923796c9442daa139951ab3fde2b.pdf
    • https://static.usrfiles.com/ugd/d17951_fed7971f7a514a4682472cf05ba0ae36.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9409/files/pojoxamoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1846/files/esc_hypertension_pocket_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/blue_bird_naruto_opening_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/handbook_of_applied_cryptography_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8039/files/51092440817.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_fdfbb6ec3e3044daabf9954b10b35861.pdf
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdf
    • https://static.usrfiles.com/ugd/2f7815_6dab5435e75146078487527e0c7f97a4.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_d97ca57aef02407b815c80da4f95e190.pdf
    • https://static.usrfiles.com/ugd/e2c250_9fb288459dce438a9dd857b42613cb80.pdf
    • https://static.usrfiles.com/ugd/270e53_bfbd2d4ba66d4b6383248ab89b61d211.pdf
    • https://static.usrfiles.com/ugd/d1c05f_dad9edbca86a47f6b2011bd568b02cc3.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_off00006026.bin
785afceff84ffb49378cb72a3967fded1f99cd38fc672f3d22f8f9360af3e368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 6052 bytes
font_01_sfnt_off00007495.bin
6cd349cc1604fd19dd0ef01c3d1bd5a3ec7fb0a960d591bf308c75cc09ec87ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 13868 bytes

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