Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b26173edfd016e…

MALICIOUS

PDF

56.4 KB Created: 2020-08-21 07:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36bf4bfc6a5d4bdcb1a900ce77c9247 SHA-1: b194cc074ea218163147a95fd4037880245e25dc SHA-256: b4b26173edfd016e50fb614ad8cffd1d1ab15210a46c3ca962b579ba310a1df1
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 'https://ttraff.ru/pify?keyword=free+google+calendar+template+2019'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. The ML classifier also flagged this PDF with high confidence.

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/pify?keyword=free+google+calendar+template+2019
    • http://files.craigaprice.com/uploads/1/3/0/9/130969633/perem.pdf
    • http://files.computerscpr.com/uploads/1/3/2/7/132740860/xubujolodosetejokuv.pdf
    • http://sorirodok.andrewdrichards.com/uploads/1/3/2/8/132814930/8947232.pdf
    • http://files.garfinkelseruya.com/uploads/1/3/1/4/131453512/zigunamopof.pdf
    • http://files.birthcontrolsafety.org/uploads/1/3/1/6/131637649/e8307c54067.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/48956458201.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/microsoft_visual_c_2008.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/python_aes_encryption.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gilakijifaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/alligation_rule_in_maths.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/bekikale.pdf
    • https://cdn.shopify.com/s/files/1/0435/0869/5200/files/pixaxinujuvakopiwetuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/sixumisebopab.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_off00009db7.bin
a59bccfd23cae6f49ed79a56959609611949d9f6893edcf35e6cb328a927dc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB7 5652 bytes
font_01_sfnt_off0000b0e1.bin
cc05ff2f0d1d243fc592a9c66ed7d3aed2f974d543e7aee41513ed4f24662a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E1 10536 bytes

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