Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6cae1352209f70…

MALICIOUS

PDF

38.0 KB Created: 2020-08-30 08:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e1a4a88dec38e55440c6ea44ac2cde SHA-1: 27a23c7dab92162e1f40b5a63edebf3b75ce292c SHA-256: de6cae1352209f70d35377f26b62960cbe228661978ce7f49fdb9cfac319a9d3
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com', suggesting an attempt to manipulate search engine results or distribute content. The presence of a visual download button further supports a lure-based attack. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

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.ru/wix?keyword=merkury+smart+camera+manual
    • https://static.usrfiles.com/ugd/cdb50c_37ec63183d7146d89d4910b5dae0d8a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6107227752f744bc9b6093a3d5bc7f42.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bc6a584438644838b5e22bc81baf359.pdf
    • https://static.usrfiles.com/ugd/f515ca_117531c619aa4dd28983ce63b2b7cc03.pdf
    • https://static.usrfiles.com/ugd/b8c837_442a99682b674e5989cf22ddb6f6c15f.pdf
    • https://static.usrfiles.com/ugd/b11f6d_563c59b560ee449cbfb45df0bd1d0343.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa41ffa18ba4e1197b953e9ff1370bf.pdf
    • https://static.usrfiles.com/ugd/64d889_f1662adcf5604de6a594ae1afa3f152b.pdf
    • https://static.usrfiles.com/ugd/362633_1abc5ec43e234a7ea10e0a3dfeccbc77.pdf
    • https://static.usrfiles.com/ugd/b8c837_50dd207bfee7435e9a2ca0d5fbc1986b.pdf
    • https://static.usrfiles.com/ugd/76156b_0dac7e4bca7b450c824aec5d1dcf7ab0.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_off00004b05.bin
d8c6c5cffc8b53d09f3f4686f30e64c97849de90e3159174e427fe5844aec50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B05 4840 bytes
font_01_sfnt_off00005b69.bin
0bd29a6fc22dad6e73ee4e1d1c40664f6583535d17b053c72bdcc44937a23a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 9988 bytes
font_02_sfnt_off00007d7e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 4324 bytes

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