Malicious PDF — malware analysis report

Static analysis result for SHA-256 528dd5b7604022e8…

MALICIOUS

PDF

40.9 KB Created: 2020-08-08 10:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c2c364fb8f68cda21c2e5143d6e079 SHA-1: 8fc9da3e7a0977c97a23f9b8397ed5f34e5161b8 SHA-256: 528dd5b7604022e8f34aa56939f652685dc59d60f2b409df8066deed89fe1a4e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment 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, contains text fragments related to 'Chaitanya charitamrita madhya lila pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious content. The presence of a link farm heuristic further supports the malicious intent of directing users to potentially harmful sites.

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=chaitanya+charitamrita+madhya+lila+pdf
    • http://pijibekiv.anchortours.ca/uploads/1/3/1/8/131856257/94d5f354c.pdf
    • http://files.halfmoonday.com/uploads/1/3/0/7/130775992/e72f9f10249.pdf
    • http://files.christinacrittercuts.com/uploads/1/3/1/3/131380054/wolep_budenidep_zosikusaxo.pdf
    • http://files.thomasmccartypromotions.com/uploads/1/3/2/6/132681452/888470.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/tasamefuzeralatevawepap.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/business_name_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/53577484431.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/discord_block_quote.pdf
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/usa_charachter_arcade.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/peter_benchley_jaws.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/76224537304.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/38256107846.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/14305154502.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/76902691797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/ballade_to_the_moon.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_off000057c2.bin
51fec5176b63290d599f8f6d78bd5104a58ea6853207a0ec9ca0f419c77fae50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C2 5224 bytes
font_01_sfnt_off00006963.bin
dcf32eefca9d7fa1c28b6d40fa44c7b02b3e8acb113a43c5cc7e0c1a46e272e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 14796 bytes

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