Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b146bc5841168a6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 04:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8af2c3ce1af87908175b875156061832 SHA-1: 8d38901fe3bad9b6bec7ffa3d0d6fcb11a9b9d2c SHA-256: 2b146bc5841168a619ec5fbb7fcdbbd609433894c734004a2407318caf1ab855
120 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.ru/wix?keyword=wii+remote+pin+windows+10'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, also contains the redirector URL. The primary attack pattern appears to be luring the user to a malicious site via the embedded 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.ru/wix?keyword=wii+remote+pin+windows+10
    • https://static.usrfiles.com/ugd/6f53d7_cc119d7787c345428174d872f53bceea.pdf
    • https://static.usrfiles.com/ugd/162fe6_3131eb531111487dab1e742ad9ed8057.pdf
    • https://static.usrfiles.com/ugd/96bf9d_f5f4305500774a0484ee8d586b33871c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6a7acd930df4189b0463412e8d27f4b.pdf
    • https://static.usrfiles.com/ugd/5de1df_efd92f66f32f4b67a92cd697c4f9d0c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a2c7ab771be4782bb82ef33e6564db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeba14b6879c43c8a61d852a8f1d1ae3.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a091968c7d047ca85c15014fd2c06eb.pdf
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/convert_files_to_microsoft_word_format_docx_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/nefewisotit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/lugojexope.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a19685ffd1140d99fbc63c84effa6a6.pdf
    • https://static.usrfiles.com/ugd/5b9a87_46c4f48393724a2c86c0481423ad5c3e.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_off00006bb4.bin
9409a00d8ded44358693afc0033e9ec0b0ea728b142325c6a21ac22fda96d40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 5164 bytes
font_01_sfnt_off00007d49.bin
883ecffd11b963280b940fa849c1892b0f3b52ffe21d0fb42877639be539e439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 10280 bytes

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