Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d95ac4a248cb20…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 09:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0677d7525115c901d167be293a27801c SHA-1: 375746eeb4d3c623e26e34916a8d63bc7cabda91 SHA-256: d0d95ac4a248cb207abafd577fe3e7594f6cd7c09283ce43d9091a597864ee36
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as information about a Rheem water heater. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link https://ttraff.cc/wix?keyword=rheem+water+heater+model+82v40-2 leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a tactic to broaden reach or evade detection. The ML classifier also 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.cc/wix?keyword=rheem+water+heater+model+82v40-2
    • https://static.usrfiles.com/ugd/cc14e4_4f4267e9cc474304aedfae925cd44d94.pdf
    • https://static.usrfiles.com/ugd/353d00_9827f3928f0c402f86f635186a6f04f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_80dfd21b35ce4ed5bbb4e95c357f5224.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_b5033b408309471c844d9c56e820fbe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_503efc8152634a04a3a77f07d1e15659.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/zepotilunatejerolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/lizaburubilefojabi.pdf
    • https://cdn.shopify.com/s/files/1/0463/3228/0994/files/eosinophilic_esophagitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0429/6163/3439/files/waredavakiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/12097089519.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/zomokuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/asura_anime_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/dopipewoxobesoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/jekodozejowija.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/76951501851.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/62229433302.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_off000051b7.bin
971a6f252e4c972137b0a7d9c952d7f5c22002abd0efd9db6e1bdc07742ad396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51B7 5632 bytes
font_01_sfnt_off000064db.bin
b5d4d9ad352fb31c07073ad7b2a538c08e782bd068a612c4bc5eb80172691f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 15184 bytes

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