Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb3c0319fb30bd9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 23:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba8455f92e1c674b03fa1348e7ab5c2b SHA-1: 5404532796387e885b8df3615e48fb1f037cb76a SHA-256: 9bb3c0319fb30bd96b3a4d41f875101e4ccb48ee161b6b32ce95d70f76095d85
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about 'Zerodha algo trading'. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this, pointing to ttraff.com. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, suggesting a link farm for SEO manipulation or to obscure the primary malicious destination. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this file.

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.com/pify?keyword=zerodha+algo+trading+pdf
    • http://files.bonnetcatering.com/uploads/1/3/1/8/131857540/908ef7ae4959.pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://nipop.softwareacademy.co.uk/uploads/1/3/1/3/131383647/sorulewukawegadi.pdf
    • http://nulored.eliterateandlevelingup.com/uploads/1/3/2/8/132814930/5536056.pdf
    • http://files.penninewalling.co.uk/uploads/1/3/1/1/131163512/98e4022.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/3721459918.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/nukowojete.pdf
    • https://cdn.shopify.com/s/files/1/0466/4963/9077/files/wwe_championship_games.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2199/files/50176963742.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/16737658559.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/wipuzijadisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/17460454382.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/1325073134.pdf
    • https://cdn.shopify.com/s/files/1/0434/0701/6103/files/kidejazusifebesurip.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/using_mis_7th_edition.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_off00006cde.bin
bf5975c68a69a9fbecedde831bd21257a2c32263f09de0f7eee9d0995ccd3150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 5084 bytes
font_01_sfnt_off00007e23.bin
4894be1c1e4de816127a4006520b613cb372d748dc280bb7e143aad53f98dfb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 10424 bytes

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