Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83b7ff9545a0c67…

MALICIOUS

PDF

38.8 KB Created: 2020-08-31 01:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30890b56f9674906ffc9048d9dd4a645 SHA-1: e4a21b9784c31dc1a98dfd469786f0a1fa0be9a9 SHA-256: d83b7ff9545a0c67012b2a4c450d74f840091395b0bffa677f3c80f1514cbb94
130 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to deliver a second-stage payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com, potentially for SEO manipulation or to host further malicious content. The presence of a visual download button further supports the lure-based attack pattern.

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=dls+18+100k+coins+profile.+dat+file
    • https://static.usrfiles.com/ugd/0a593f_81b539e2b8b14f7ca6bfdee25d199ea8.pdf
    • https://static.usrfiles.com/ugd/33ab24_a401162b50194a22a7018bbb7b9b8b20.pdf
    • https://static.usrfiles.com/ugd/f967ac_0e9e247fd2f6414ea4315a32e6eb3e44.pdf
    • https://static.usrfiles.com/ugd/b8c837_af10a04a980c4568ba22dc6c15a8475b.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_c72cd927127b452a87d5a80d6fa9c10c.pdf
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/27799376042.pdf
    • https://static.usrfiles.com/ugd/7c30af_e9c5e85d56b54df892b5745833a2426c.pdf
    • https://static.usrfiles.com/ugd/cb2bed_0ed7e2184c6a498ba5adf8506f8f179b.pdf
    • https://static.usrfiles.com/ugd/9219f8_931615e91dde47f6a8cb80d9d17ec33e.pdf
    • https://static.usrfiles.com/ugd/b8c837_95797f8b807143c5af5fd41e7d5949e8.pdf
    • https://static.usrfiles.com/ugd/269bb8_fbdd9d8f039646e8b213cb7c0de81224.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/bimuxunewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/moneverozo.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_off000057c7.bin
7d8171030e05501c340f8dff22d750e7073fd7faf21d04051eec3d5b6370d59e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C7 5632 bytes
font_01_sfnt_off00006aff.bin
c4c8dd04a3c62c91a97fe69511f522be8b934e622916f306cc40f2ea7d24303a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFF 10396 bytes

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