Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1f13110f30b5ec…

MALICIOUS

PDF

46.4 KB Created: 2020-09-02 01:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a35bce0345b1b8ed0d6b0d214d96c13 SHA-1: 5a3ef80d2b9d81dffb1cca3bdef78e4c813defe2 SHA-256: 1b1f13110f30b5ec4f5e3726b824040e914322d4d98ea35aa26b967ce7ecb6c7
120 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, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=auto+format+code+in+vscode', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to code formatting and the authoring application, suggesting a lure to entice users to click the malicious link.

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=auto+format+code+in+vscode
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/matuxexunewela.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3535/files/jokubidivosadivatavujum.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/31629897358.pdf
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/alimentos_para_diabetes_tipo_2.pdf
    • https://static.usrfiles.com/ugd/787b0a_f36ad5a0818242d7b5ebf981110b9d0b.pdf
    • https://static.usrfiles.com/ugd/b58d21_afb3ce6eb16646d9aafef514b2908e9b.pdf
    • https://static.usrfiles.com/ugd/74a852_ca15a5e5f5a540e7a3f4fcd93ee1b5fd.pdf
    • https://static.usrfiles.com/ugd/fd3290_07a4f2d1601342b2b8a6caa2024abd43.pdf
    • https://static.usrfiles.com/ugd/6f58fb_599b594c84c24c7ea7f809c8e8e129d9.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/merovelasigizivegiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/vuduxuletoxakop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a96.bin
47e22614599f1d722f0eec0d8ad97e40a54fb2f43a8ebb88eaccd8bb3e14b935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5184 bytes
font_01_sfnt_off00006c29.bin
0702a78200414b9c018f0b2dc12b0c00165f34d5d2c2540a351648dfca0f72c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C29 14764 bytes
font_02_sfnt_off00009671.bin
6746e5238264c3f7206b45ffeae26f3f10e7188f386a9109fed608d3c0b2c909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9671 16524 bytes

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