Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6ca25d60007e31…

MALICIOUS

PDF

42.2 KB Created: 2020-09-03 14:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d521967f298a1e296144d11bef28b6 SHA-1: f1db9f8cb047e886beed21600a4660f4088fc217 SHA-256: ae6ca25d60007e31736c751eea7e0302cfa878567c13ba63ca11cda2e9d27054
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=twice+heart+shaker+piano+sheet'. Additionally, the PDF exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to this external 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.club/wix?keyword=twice+heart+shaker+piano+sheet
    • https://static.usrfiles.com/ugd/d63aaf_a62427fdf96949aab8497db7db254f48.pdf
    • https://static.usrfiles.com/ugd/bb13a2_1a71a8e17f75483cabee5dc1b446dcd4.pdf
    • https://static.usrfiles.com/ugd/0779a3_6c04e5cf2d1b4a1a94e3522903450c07.pdf
    • https://static.usrfiles.com/ugd/269bb8_4d05bc3d163c4690957376cc5a1e67a9.pdf
    • https://static.usrfiles.com/ugd/b97cba_7c281c90183f46b28573627e51b75a31.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2bea7a2424b4e5a95fd7814cc3b2ccd.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/wemumuwowolumagukexeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/razovuwixusetutibox.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/38241756952.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/puxubulosubozetozepilibu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/wifugovadosubek.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/79972751538.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2562/files/tapusitovigezuvabim.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_off00006001.bin
29deb2d6387bd87bff573bbe764ccff50d9b892feee9e652e71b5dc304855602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6001 5096 bytes
font_01_sfnt_off00007162.bin
d209910c401713c2598e6add772bf7ac3faa3f6f8244d78608a1966d4dc453ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 13904 bytes

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