Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c4e9a0dc955999…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 18:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa9962696b0608f1fc222d725d221065 SHA-1: 6229a218aa355a8ca943bec42fce216b41cb92d6 SHA-256: 44c4e9a0dc955999febe59ae42d90a327a9a189ed980df56cb107c1867beb67a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One critical heuristic identified a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this same malicious URL and several other URLs hosted on 'cdn.shopify.com' and a suspicious domain 'volkehistorymodern.com'. This suggests a link farm strategy to distribute malicious content.

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=anemia+de+c%25C3%25A9lulas+falciformes+qu%25C3%25A9+significa
    • http://ninof.volkehistorymodern.com/uploads/1/3/0/8/130874104/4353918.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/toro_lawn_mower_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/lesubomokewefinage.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/trove_neon_ninja_build.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/aggregate_impact_value_test_astm.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/gidotobeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/baxemojigesuxusisakere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/14514274868.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_off00005e65.bin
ecdf783b45be8d74375bb2d88f4a779e9df4b7ad9fa4cd45769386201fbb3182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E65 5596 bytes
font_01_sfnt_off000070ff.bin
e5224454427daf983c0abdef69f97d81c0cfa6aff5a75c98aa3c403553269fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FF 11356 bytes

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