Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdace4b50f785bac…

MALICIOUS

PDF

48.9 KB Created: 2020-08-24 16:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af9c1e988d0c2e3c917e0c62bcb19dcf SHA-1: f4723e8f8749253f000919e8ebffbca2f84ea280 SHA-256: bdace4b50f785bac2711f37cbf968503d272d3ce62d7d334ab2c48e3982e609e
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, https://ttraff.cc/pify?keyword=botulino+nel+formaggio+sottovuoto, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious redirector.

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=botulino+nel+formaggio+sottovuoto
    • http://files.cfpleasanthill.org/uploads/1/3/0/8/130874612/9427238.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/gmo_plants.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/dil_aashiqana_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/98308864780.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/xodaviratopimofeneroruvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/bodhai_kodhai_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/zobugad.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/69357233975.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/31035563716.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/92413552920.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_off000082c0.bin
d920f6d63eb4a965f595abc8491aa116d8c0a43b059825fe1ac4bb2fbee482ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 5196 bytes
font_01_sfnt_off0000945e.bin
4ef6fc4ee4c764b3fd75cee8e3b74dc3390aa9df3956e2433bcb578ae6ef1229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945E 10736 bytes

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