Malicious PDF — malware analysis report

Static analysis result for SHA-256 414b79fdb131aead…

MALICIOUS

PDF

45.3 KB Created: 2020-07-25 04:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35636708e2dc309ff44536f98307084 SHA-1: 92ea79756a9c5571f08eb9e66bd20eceb7da72af SHA-256: 414b79fdb131aeade64ee943cbdc2f20dfc9de9207e0686b3ebe8254daea87b5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to the 'ttraff.cc' URL's keyword, suggesting a lure.

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=arya+telugu+movie+bgm+ringtones
    • http://files.sequimvalleyfoursquare.com/uploads/1/3/1/0/131070051/xowun-jamivebiwupu-fufuk.pdf
    • http://files.abbyweiss.com/uploads/1/3/1/6/131606405/2546fd2cbfc916.pdf
    • http://files.norcalskindivers.com/uploads/1/3/1/6/131606854/7e51e.pdf
    • http://files.texasphilosophy.org/uploads/1/3/1/3/131398479/ninuve-vasevu.pdf
    • http://files.marcoujor.com/uploads/1/3/0/7/130775727/d03e596b94283b.pdf
    • http://files.texasphilosophy.org/uploads/1/3/1/3/131398479/ninuv
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/28809760419.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/67475304607.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/burosojitomisagitem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/85529838571.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/46684149857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0431/5126/1853/files/varozenuvezunuka.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/judalageguxavadakibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/4704701544.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/41462842517.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/zafixoki.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_off0000752d.bin
457e041ff3183833bc10bb75203199d673fb8b2f30d50ca093d54b0cac1ada63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5180 bytes
font_01_sfnt_off000086b8.bin
605a3d48ac8cb6a33e6434d8b0242991967fc184a23fc20f337a1287d69d682d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B8 9744 bytes

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