Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d262c5d7835fc1e…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 11:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9194af843ec07b39876500e46d18fccd SHA-1: 82775467f5c063f193db2693d60ece19ab15f441 SHA-256: 3d262c5d7835fc1e0cca0eed0ae063765dc454b09b117e6146b7d268137b62e9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious payload. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of a 'download' button lure further supports the malicious intent.

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.cc/pify?keyword=differential+amplifier+using+bjt+pdf
    • http://files.whiterockmedical.com/uploads/1/3/1/8/131856632/3074137.pdf
    • http://files.mandiecline.com/uploads/1/3/0/9/130969884/bapajapupowuzo-batavexi-dutafuriju-kavifiturutesot.pdf
    • http://files.phonecharmed.com/uploads/1/3/1/8/131871780/c53bd33251.pdf
    • http://files.westernenglishsetterclub.org/uploads/1/3/1/4/131437693/2479888.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/lezetaletivazolofuvodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/55235854124.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/animal_crossing_item_ids.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/78178278006.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/xoxojux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/xebizumonejowilukos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/84349039880.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/soxajidigotugawiwafovusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/ronokojowasalutidozejifaw.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_off000078c0.bin
edca3389241496e989c985c5314250e3340db2a279f68d6a167ec772b99587d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 5576 bytes
font_01_sfnt_off00008ba5.bin
ce73c6c09c908e63cde3f3d138d7665986adc3489b0c456d4d8dc1306cf8658b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA5 10692 bytes

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