Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c477ed4c31271f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 04:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c71facce4ddf711062eb08a97f265ad SHA-1: 0b5132bb7290ba45ab4af570b8484b7ec7152f04 SHA-256: 49c477ed4c31271fe9550c98b194d443a0dc10ce6c7f4f8a76d86fb18a6196cd
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.ru/wix?keyword=girls+do+porn+211', is identified as a malicious redirector. The document body contains garbled text alongside this malicious URL and other benign-looking PDF links, suggesting a deceptive lure. The ML classifier strongly flagged this PDF as malicious.

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=girls+do+porn+211
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/xoxomitafudurunuvejuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/biology_projects_for_class_12_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/resumen_del_libro_calidad_productividad_y_competitividad_la_salida_de_la_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/7578429542.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/10178145398.pdf
    • https://static.usrfiles.com/ugd/e3ff21_e501381f5e114b9b8d817d1a9374ba51.pdf
    • https://static.usrfiles.com/ugd/b8c837_acb377122f174942975dd9f44d648a55.pdf
    • https://static.usrfiles.com/ugd/88a84f_551e2c0f405745778e212774ec1d8839.pdf
    • https://static.usrfiles.com/ugd/97493d_7232931e6a0d4a3e8c647fc52abadf32.pdf
    • https://static.usrfiles.com/ugd/1c90dc_55b197ccf52c4b8cb2758beb4e902215.pdf
    • https://static.usrfiles.com/ugd/83b1b3_f3a3b6b46a1f4eb39b3df7f44010b5df.pdf
    • https://static.usrfiles.com/ugd/b8c837_7430fe01572444d5a71cf611f5bbdda0.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/all_about_upsc_exam_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/nanojalirujulomifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/alistar_support_build.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_off00006bde.bin
199ede12d157973b84bb1d16377b1766d774de7c0f9c0abfeb6e103ee5e0e43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 4956 bytes
font_01_sfnt_off00007cdb.bin
9005072e6d254643d0282d460d4db28d53ae684690a8ec847bc0c1135144e6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDB 10692 bytes

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