Malicious PDF — malware analysis report

Static analysis result for SHA-256 43405c3bc0b7db43…

MALICIOUS

PDF

42.8 KB Created: 2020-09-11 22:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65af03826dab234f63ccad3edc265310 SHA-1: cb81c2b83170d1245b7ee52b214837cc8588b27e SHA-256: 43405c3bc0b7db439f155c254677d2927738baa9c1055b51532896fd7a9ff51a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains a reference to 'catering management software free' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.club/wix?keyword=catering+management+software+free
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/poweredge_r840_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/hepatic_vascular_malformation_ct.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/autocad_file_to_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/90409059828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/guvudoliguvora.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/christmas_party_invitation_templates_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/vitoreworokipuloxela.pdf
    • https://static.usrfiles.com/ugd/76dd3d_8a7345dea81243d89469e03da66d5ba4.pdf
    • https://static.usrfiles.com/ugd/89363e_4f5067e8dc3544dfb7cef1be9e467cb1.pdf
    • https://static.usrfiles.com/ugd/5ad03d_29de1aba45b5435e9a0dfea59a28cebf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c74140e3b1914e63870d22d8e7cf02ed.pdf
    • https://static.usrfiles.com/ugd/68ec51_d2510c85a72c44e1a5d37cc16764cb22.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_2cf5b45ae386410c975c8898e2aaad6b.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_off00006ac0.bin
45ba127f3dcf9b4420e4fff7150da33155a96bddd3e8f6119c518c9e68b95e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 5052 bytes
font_01_sfnt_off00007beb.bin
cbb7b762f6bc5d2bed2679f5a8bfa954fcd3f9ee83e1deb03dac3992554d392e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEB 10008 bytes

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