Malicious PDF — malware analysis report

Static analysis result for SHA-256 295e81e0f662cfbb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 15:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066e75f3e390ba466e22d0cff850a5c4 SHA-1: b26e30ea863dbed41f45e477dfd90fb088fdd28e SHA-256: 295e81e0f662cfbb460bf3dde2797f8451d9c4a72abddda1cba544be1ec3d41a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, which is flagged as a PDF link farm. This suggests a phishing or redirection attempt to a malicious site.

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.ru/pify?keyword=afektif+bipolar+adalah+pdf
    • http://files.prettysbeauty.com/uploads/1/3/2/6/132682585/a6747b.pdf
    • http://sogawaxe.emilyeaglin.com/uploads/1/3/1/8/131871899/sizutonuna.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/nc_math_3_released_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/94767538557.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/figegufiwedizumej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/86110333045.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/94890743583.pdf
    • https://cdn.shopify.com/s/files/1/0431/1905/0908/files/wezuriraxizunibafireni.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/saleluvajefatumezemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/20130725598.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/wetokowutemilejow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/89632106962.pdf
    • https://cdn.shopify.com/s/files/1/0432/7607/5164/files/color_by_number_addition_and_subtraction.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/18020129209.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_off000063b7.bin
21db1967cd85e97b2b2db7a142d9b26da40743304b7fd8414bcf929f5d3d59e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B7 5144 bytes
font_01_sfnt_off0000751e.bin
32fe82c4e640b2a4543d52571c17c7cf871652bd8710301b7e9cc0cff368cbbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 9884 bytes

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