Malicious PDF — malware analysis report

Static analysis result for SHA-256 473cba35c5c67fc5…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 18:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe500f23704d6dffd799f598ccef20c SHA-1: 227f46cfaff76d4fabc4c5dd26bc51578cfdd681 SHA-256: 473cba35c5c67fc5935dc5252548408a0c9cce8e56a912c74f798167f30fc876
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=blender+animation+projects, which likely serves as a lure to a malicious destination. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the link farm and redirection attack pattern. No scripts were extracted from this sample.

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.cc/pify?keyword=blender+animation+projects
    • http://files.brandtmarineinc.com/uploads/1/3/2/8/132814022/5412827.pdf
    • http://files.mmevanneste.com/uploads/1/3/0/8/130814234/rubixarur.pdf
    • http://fisowojed.thecameracart.com/uploads/1/3/1/3/131384169/a3f2407dabab5.pdf
    • https://cdn.shopify.com/s/files/1/0435/0184/6692/files/motor_insurance_policy.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/bovufasira.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/71185285534.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/61910976222.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/mubuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/cargador_solar_para_celular.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/38065789454.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/adventurers_wanted_book_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/yang_ming_annual_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/23096749458.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_off00007117.bin
2acce312c3a05340f0294e6bdb05f38a7844ee98d4199eb53e14b29f1d6aea5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 5344 bytes
font_01_sfnt_off00008329.bin
9eb7a06187f0a08f352e6b931d14e05295de4fbe43b7ce9c6619274e6437ecfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8329 10572 bytes

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