Malicious PDF — malware analysis report

Static analysis result for SHA-256 5976c9c2be29f320…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 11:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8915f1c468820e07a8caf3a415e3c4 SHA-1: 9f611db363e6ac10e28f9cbf66a69a23d3dfe694 SHA-256: 5976c9c2be29f3205d00d49a8e2e510858aaae95e83b20392a8441ea73111e3a
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=responsive+newsletter+html+template+free, which likely serves as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the redirection attempt. The presence of a link farm heuristic further indicates a malicious intent to distribute 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.ru/pify?keyword=responsive+newsletter+html+template+free
    • http://files.elisabethnorton.com/uploads/1/3/1/4/131408664/wupefibuvazebo.pdf
    • http://doxokodif.infantmassagenewzealand.org/uploads/1/3/0/8/130814328/75dce4e620fd2.pdf
    • http://files.takebackthecoop.com/uploads/1/3/0/7/130775649/gilademowu-ditujoporedok-levozemodelabiv.pdf
    • http://files.wawaudax.com/uploads/1/3/0/7/130776268/vugudelerus-fiwitapinel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/xakekalisunenoka.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/fukuganutaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/16303609886.pdf
    • https://cdn.shopify.com/s/files/1/0436/6041/1033/files/580325204.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/differentiator_op_amp.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/zotapidegebid.pdf
    • https://cdn.shopify.com/s/files/1/0449/4727/5931/files/js_random_number_between.pdf
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/24774128765.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1589/files/57886712608.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/15020631460.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_off00005ebf.bin
8dcb94ed13d620202f82db75aad2f983e6c663c971d1128b0ce5be6d2362a8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 5300 bytes
font_01_sfnt_off000070ac.bin
e2f4421f56bbb850757fad1439f69c58926a6650db920e97bcc375f53cf788be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 10060 bytes

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