Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e67db949362977a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 14:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b8f5fa4626b774eef48a5765f619d0 SHA-1: 673381728a5c2f6f2a8be270ca0b1ff55a47f8ae SHA-256: 8e67db949362977ae0beda5fc9fbe9c45bf6954bcf74931553e98f395a36dd7f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One of the primary links, https://ttraff.ru/pify?keyword=carrion+crown+pdf+free, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious sites. The heuristic firings confirm the presence of malicious redirector links and a link farm.

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=carrion+crown+pdf+free
    • http://nubipufu.artbyannette.com/uploads/1/3/0/8/130873851/xoxizedebusitulul.pdf
    • http://files.mindyleanse.com/uploads/1/3/1/4/131409090/gujejugarinuzekur.pdf
    • http://files.vidlersautomotive.com/uploads/1/3/0/7/130739081/mifazab-vuxob-fixomaja-dulidilizopelu.pdf
    • http://julase.nyewoodperformanceponystud.com/uploads/1/3/0/8/130874038/2502102.pdf
    • http://files.gelaboutique.com/uploads/1/3/0/7/130739004/1622797.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/c_singleton_class_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/95359221579.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/kararero.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/8624669496.pdf
    • https://cdn.shopify.com/s/files/1/0435/8402/8833/files/78303905279.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/68263268360.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/66642578805.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/15344611694.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/xovofowulawerezewox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/verbal_ability_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/pevimobusedafoki.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_off000072d6.bin
d84c3376d9bc7635cc7967a17eb0f3732209860d5d897250901e0b7ebd5d6255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 4936 bytes
font_01_sfnt_off000083c6.bin
8197cbc2e2932336777d567cdc69afefc59fee4f34e2a4a3ac6d86f4caf12fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C6 10008 bytes

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