Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d453fa5713dc19a…

MALICIOUS

PDF

68.0 KB Created: 2020-08-04 21:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be499a8adca911e3c9c485ded529fa36 SHA-1: 1d6f8cccb58b6433ebb2b61e6e8488d10f22990d SHA-256: 3d453fa5713dc19acfce51e402f59ee8b81a1a4c8cf8f9be19ba9a282d9d5822
150 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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=biodiversit%25C3%25A9+v%25C3%25A9g%25C3%25A9tale+cours+pdf
    • http://files.fbcggyouth.org/uploads/1/3/1/4/131453278/6b79bc598f1a0.pdf
    • http://files.mikriworldllc.com/uploads/1/3/2/3/132302859/e4de3d.pdf
    • http://files.designyoursignregina.com/uploads/1/3/0/7/130776401/3551107.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/fafojozagiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/lujaropigef.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/panuwalo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/65406105028.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/burner_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/67158961054.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/31461522797.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/zepufejezukil.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/tamil_story_books_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/81432456317.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/meduxipapilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/49128383850.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/punawezosuvub.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_off0000cbfc.bin
daf7d24626ba50abdb3e5d89b034b75d7fdc9d46ce9f5121afcf4a3d97acfed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFC 5572 bytes
font_01_sfnt_off0000dec7.bin
304ed12f3790e93455009f1c1c75394089b06283b8d9bc6a7b42006485ba952d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 10656 bytes

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