Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d545ae94d1e278d…

MALICIOUS

PDF

48.3 KB Created: 2020-08-22 23:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef4032666a1736e3084a4c28272ec1d SHA-1: 264e3605208a478b14c8d1bd866a6af8e1268a3b SHA-256: 4d545ae94d1e278d47e13db0e578e5aed9f18d79c53ee16f1a58fdd58b36ee8a
128 Risk Score

Malware Insights

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

The PDF contains a call-to-action button and embeds numerous links, many of which are hosted on Shopify but point to various PDF files. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is used in conjunction with a lure for a 'Kumon reading level c2 answer book'. This suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kumon+reading+level+c2+answer+book
    • http://files.designhireenjoy.com.au/uploads/1/3/0/8/130814205/ramub-zirural.pdf
    • https://cdn.shopify.com/s/files/1/0433/4292/1886/files/4187366762.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/tawoxafuvifisukane.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/72502350716.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/17366798573.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/cookie_clicker_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1364/files/lufibamalopibululaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/centrelink_aged_care_assets_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/wedding_march_piano_download.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_off000077a4.bin
fd7133ace3bde47ad7e5c68233e5e4d5783ae8c224b8888ff526958793ff897a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A4 5716 bytes
font_01_sfnt_off00008b10.bin
b36e4d639f9e777e704b8e059525c67f1a657350aaf156967d13fe83eebb31bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B10 13328 bytes

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