Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd655969244ce2e6…

MALICIOUS

PDF

51.0 KB Created: 2020-07-28 02:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c4ab3c081aa6de7f655cf88fbc9e80 SHA-1: 1e837483294c52045edfda3e400d0ce689607dc7 SHA-256: dd655969244ce2e636a6244c6c20a8c8b78a3eafaaaaf92f57556e858e218b15
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the title 'Alkylating agents mechanism of action pdf', suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious redirection pattern.

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=alkylating+agents+mechanism+of+action+pdf
    • http://files.oskarandjulia.com/uploads/1/3/0/9/130969835/326187.pdf
    • http://files.littleyap.com/uploads/1/3/1/3/131381422/6946112.pdf
    • http://files.healthyhap-peanutrition.com/uploads/1/3/1/3/131383791/8095551.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/93334487779.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/359055747.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/dikivewowimadenitorimok.pdf
    • https://cdn.shopify.com/s/files/1/0440/4304/2966/files/61885399648.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/tiziwusexumagelene.pdf
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/69420072520.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/pebalegoredesolowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/64428244130.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.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_off000088d8.bin
acdda2dd1cf11a06657d2c3f7c7a7e1b7c041d6059577532e18100340d28a717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D8 5416 bytes
font_01_sfnt_off00009b20.bin
f979d387c0c8dbdc145cc034bc9915bea014688e94f554f9ee3bee5c07575c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B20 10420 bytes

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