Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d6e40c321aa2d3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-04 06:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a88f02b5f473538a998c72acccb482 SHA-1: c54cb6afc857cbcc22c1cb9048adcc97d4fb1fe2 SHA-256: c3d6e40c321aa2d3014480b5d2deb2740d53b76d07e477da707d6ffa75d0274e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=financial+risk+management+pdf+free+ebook'. This URL is part of a link farm designed to manipulate search engine results and lure unsuspecting users. The document body, though heavily obfuscated, contains references to 'financial risk management pdf free ebook', reinforcing the lure. The presence of numerous external PDF links further supports the SEO spam and redirection attack 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.cc/pify?keyword=financial+risk+management+pdf+free+ebook
    • http://files.buybps.com/uploads/1/3/1/3/131384604/munosa.pdf
    • http://files.dragonfirestore.net/uploads/1/3/0/7/130739253/826469.pdf
    • http://files.liverpooliti.com/uploads/1/3/1/3/131398140/kifuj.pdf
    • http://files.ambertennant1616.com/uploads/1/3/0/7/130738870/jumakis.pdf
    • http://files.davidkrasenyc.com/uploads/1/3/1/4/131437756/kubavegugodosim-livadutebavig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/wuzirawogikawonubode.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/29863249266.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/dokotutidamedefagover.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/dekijapojudokeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/31604764748.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/papuvozusuvunoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/paxomigak.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/reduce_resolution_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/3624403538.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/xopefokolegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/2001_a_space_travesty.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_off000060a7.bin
e9111ee98fc06955a7d6fa3cf27211b90dc9bd9bddc0b467baa0de25e8237082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 5636 bytes
font_01_sfnt_off000073b8.bin
40fc552f4d774f9834387492e432509ce9139460bc203b3102400276ce6bac95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 9984 bytes

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