Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8b0e906b05695d…

MALICIOUS

PDF

56.1 KB Created: 2020-07-31 14:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b22d043bd3b32113539e614da335aacf SHA-1: f3334feb23c2be64ac862649566814f8e386ebe7 SHA-256: 9c8b0e906b05695d3786d8a083568a983e78c3a301269b298f6beeccd842ebb5
150 Risk Score

Malware Insights

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

The PDF contains a deceptive title related to the Nigerian banking industry, likely intended to trick users into clicking malicious links. It exhibits a link farm strategy, hosting numerous PDFs on external sites, with a primary redirector identified at 'ttraff.cc'. The ML classifier strongly indicates malicious intent.

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=nigerian+banking+industry+overview+2020+pdf
    • http://files.rspfitness.com/uploads/1/3/2/6/132681201/9843275.pdf
    • http://files.sixftswellspress.com/uploads/1/3/1/6/131637701/wixatezak.pdf
    • http://files.woodside2-3-4hoa.org/uploads/1/3/1/6/131606206/6ffae453423.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/60908950673.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/derudojigumabalanuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/15943166430.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/58271085283.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/34169091638.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/juwaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/73819679531.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/mulukegadejekonutexuzaras.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/savelagilalup.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/
    • https://cdn.shopify.com/s/files/1/0431/1682/2692

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a42.bin
91f7f82103d773d93ecf9f72ac5c523c1964f75ace2cb7bbcc592508624d9f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A42 5760 bytes
font_01_sfnt_off0000ae07.bin
eaddb98fc2e391aa46b1f8e5d6749c51ce8041d2cacd769b213acd203dee28f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE07 10800 bytes

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