Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85359fb36d23de1…

MALICIOUS

PDF

40.0 KB Created: 2020-08-05 15:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9ecdc96fbf6dfaf1deb6ed365341d53 SHA-1: e7dc63a01c54084b8729a2b3988c8626fcd1bfd1 SHA-256: d85359fb36d23de10abf18510f4f821f56a821c1f98a298d85f774d53455d232
150 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.com, which is disguised as a search result for "Bhagavad Gita online pdf english". This redirector likely leads to a malicious payload. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm tactics to obscure the malicious destination. 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.com/pify?keyword=bhagavad+gita+online+pdf+english
    • http://files.ytbimex.com/uploads/1/3/1/4/131437515/malulikuxulaji_golerilamago.pdf
    • http://files.noelironart.net/uploads/1/3/1/4/131408170/wijejukixul-surekapulodad-kujidevu.pdf
    • http://files.fam-ilyproducts.com/uploads/1/3/2/6/132681823/lupowadida.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/59935761057.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/29001226796.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/fonovemifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/49460787027.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/73531095533.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/fegopisalikadol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/bologa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/84864162090.pdf
    • https://cdn.shopify.com/s/files/1/0432/7086/5060/files/pixelukegofozis.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/galove.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ff1.bin
aba3c6b2ce55b2511a469b70bc23fd6f16e29bc7a63d22f342321de7b4bf181f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF1 5316 bytes
font_01_sfnt_off00006217.bin
c7db7fa60cb4bb35cdd64ade2d726393478e2603adcf7556ce8373b2844563e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 4004 bytes
font_02_sfnt_off000070e3.bin
b17db27d60c4d0c9eb30d385af4be4190ab3130e0ecbbc84f3c6e4e58b01d2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E3 10112 bytes

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