Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba17284c2e8beb88…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 01:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc266f978518943928f59ffe1c94426 SHA-1: 2ec9478ba6691dfba6354bc7a304ce7ca96dd6a9 SHA-256: ba17284c2e8beb88cb4e9f25c0c9fd96f8b02d407a99cd36231ebc74c6074217
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to click through. The PDF also contains a mass external PDF link farm, with many links pointing to 'static.usrfiles.com', indicating a potential SEO poisoning or link farm strategy to distribute malicious content. No scripts were extracted from this sample.

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.com/wix?keyword=level+49+guess+the+emoji
    • https://static.usrfiles.com/ugd/b8c837_eaf3340ce393431a8cf9bcce220e30dd.pdf
    • https://static.usrfiles.com/ugd/565485_db1a2a5388754fed9949ea2cd662a72f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f42fa93df0546c9ac42e8f7dbf5d4df.pdf
    • https://static.usrfiles.com/ugd/b8c837_4430bb3af77f4d56907b984648bea16d.pdf
    • https://static.usrfiles.com/ugd/dd4472_2a2d68fbddeb4cf486cc44518f00c898.pdf
    • https://static.usrfiles.com/ugd/b4609a_7dc61846b501428b96d1ce16113396b3.pdf
    • https://static.usrfiles.com/ugd/bf650e_79e2ce47196645bd801580f65c897252.pdf
    • https://static.usrfiles.com/ugd/726ec9_812698a885d34ac08076b7fd1f382010.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/ambiguous_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/dajujokafawopal.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/70820207669.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_off0000601e.bin
556b3aa3b3580f43e5b6049d8bdf5387d522269eb3ed06e3c9759de2a1b855d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 4888 bytes
font_01_sfnt_off000070e4.bin
4305678f8c188dd6d9181f6758e746a1798ce575bdb86794c18b701ea093fc78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E4 10564 bytes
font_02_sfnt_off000094f8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 4324 bytes

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