Malicious PDF — malware analysis report

Static analysis result for SHA-256 be555b20abbe7d69…

MALICIOUS

PDF

52.1 KB Created: 2020-07-27 13:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a38591ac5e968a0fed12346139885784 SHA-1: b721da3ee6a3d6fad3094da15720e69820b5cdaf SHA-256: be555b20abbe7d695899a22276be2737f93051fa252dd8e807036508720d3372
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external PDF links, with one pointing to 'cdn.shopify.com'. The ML classifier also flagged this PDF with high confidence. The document body text mentions 'water leakage test report', suggesting a lure to entice users to click on the embedded 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.com/pify?keyword=water+leakage+test+report
    • http://files.dawsonfoundation.org/uploads/1/3/1/0/131071137/risotuligiroseris.pdf
    • http://files.veinclinicmb.com/uploads/1/3/1/8/131857679/xekabafi_kamotipevilum.pdf
    • http://files.andrewbgeorge.com/uploads/1/3/1/4/131437119/3099874.pdf
    • http://files.somersetcountyfarmersmarket.com/uploads/1/3/1/1/131164211/lonajijabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/mobenukineruwenizibak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/72932011978.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/35589275061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/46544296622.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/womub.pdf
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/37560643803.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/lened.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/86905907821.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/55759315534.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/vemomikabolitonorid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/91694150933.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_off0000914a.bin
04499f4ca051427d04ff5aeb6de0ad1efbb932fb65cd4fa155c09e7ffdf04e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914A 4696 bytes
font_01_sfnt_off0000a169.bin
b8d91dd03bf68329ad5121892b9388768da6a75ca1b6f3854a5af5e9bb6f49cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA169 9888 bytes

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