Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8d1ea9e81d1d24…

MALICIOUS

PDF

40.6 KB Created: 2020-09-08 01:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b326417ac4442cd6c3cbed0728632519 SHA-1: 47db7fe7732b1553fb71313b362ca7c98887352d SHA-256: cd8d1ea9e81d1d2472a4695828e3ff552f9fdfc27bd23f7028b8dadce5af8acb
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. The primary malicious URL identified is https://ttraff.link/wix?keyword=drew+marine+safety+data+sheet, which is likely used to redirect the user 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.link/wix?keyword=drew+marine+safety+data+sheet
    • https://static.usrfiles.com/ugd/e3834b_b253c2def2914e95a3f4fbdfb1bf0df6.pdf
    • https://static.usrfiles.com/ugd/11b39a_b2815161b86246d99d86c6e4882d4c40.pdf
    • https://static.usrfiles.com/ugd/824332_374f13d78bff49a4917a215c20d759b4.pdf
    • https://static.usrfiles.com/ugd/ac8c68_28a98eb6043246699ded1aeefe9d940d.pdf
    • https://static.usrfiles.com/ugd/9e41f0_9ce734dde7164bdfa9d68f6001e01c3a.pdf
    • https://static.usrfiles.com/ugd/0010c8_9b726077818f41d486bc0dbf661a56eb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/tulelemedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/folotukegev.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/activator_windows_office_2013.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/99051116203.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/rexurilujawuma.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf3d8c6071a45e3a927d926aac3c04e.pdf
    • https://static.usrfiles.com/ugd/4826f5_9793823dedbe4314956a37a24ca2c50f.pdf
    • https://static.usrfiles.com/ugd/a64c8c_cd78526979914c4a9ff09efa68122942.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_off0000547e.bin
9fefb16724a42218dd76dae21041bd33323f86912f101aa2d0bdea5e62d401a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x547E 4988 bytes
font_01_sfnt_off00006548.bin
633d552e8a7187208693f99087e73e11b4fb1bb0f65fec9a98a24a6bcb4a18af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 10068 bytes
font_02_sfnt_off00008795.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8795 4324 bytes

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