Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1718f4dd063394f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 12:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e4feb98868ade4edf615e2d34780bb SHA-1: dd6e638a919e58c9b9eac26ab9f97994117fb29f SHA-256: e1718f4dd063394ff2b2ec0e8ce5162557cacd2e5c304de68f2f78dc30ee80e3
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, suggesting an SEO poisoning or redirection attack. The embedded URL https://ttraff.ru/wix?keyword=weekly+calendar+november+2017 is identified as a malicious redirector. Additionally, the document body contains numerous links to Shopify-hosted PDFs, with the primary one being https://cdn.shopify.com/s/files/1/0434/6062/4549/files/takupu.pdf, indicating a potential link farm strategy.

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.ru/wix?keyword=weekly+calendar+november+2017
    • https://cdn.shopify.com/s/files/1/0434/6062/4549/files/takupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0433/8401/2956/files/navafelono.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/menu_and_recipe_cost_spreadsheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2496/files/electrical_characterization_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/mixiwazu.pdf
    • https://static.usrfiles.com/ugd/289c5e_e6a33e8fed5b43e4845915bb531f502a.pdf
    • https://static.usrfiles.com/ugd/e4a001_03afc03f70f94aa6bad39aa6749dcbf6.pdf
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/76208247487.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/40686221426.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/convert_t_nh_sang.pdf
    • https://cdn.shopify.com/s/files/1/0441/4259/2152/files/24798084368.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/zirufeze.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_off000062ff.bin
b6b8c29e0e3f3587cad09c497de829293069095fdf679434fbed7c2475f90bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 5692 bytes
font_01_sfnt_off00007671.bin
76ca4a26f6891173828bac291f0ef3bbe7d31ba46fcbdd74f8c22239af0acb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7671 10680 bytes

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