Malicious PDF — malware analysis report

Static analysis result for SHA-256 b335dc73991fca14…

MALICIOUS

PDF

51.7 KB Created: 2020-08-31 04:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc91aa92d071aa3e1e2b75ab25bc41a SHA-1: 995c477a2fd935b24f64d14334be10d3c5526eaa SHA-256: b335dc73991fca14c58112d8544b5ada263ccdaed4dee4089c726f19343281f3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify-hosted files, likely as a SEO-based lure. One critical heuristic identified a link to a known malicious redirector at 'ttraff.cc'. The document body contains garbled text but includes the malicious redirector URL, suggesting an attempt to obfuscate the true destination. The primary attack pattern involves directing users to malicious infrastructure via a link farm.

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.cc/wix?keyword=modern+age+mod+victoria+2
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/xibenexaxaxudixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/ziwarawajiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/ritchie_valens_la_bamba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/southwind_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/94603788235.pdf
    • https://cdn.shopify.com/s/files/1/0446/6668/3545/files/achtung_panzer_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/walls_server_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/fodegubafunagawukenamasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/83163262600.pdf
    • https://static.usrfiles.com/ugd/83e24f_aada01af1be34b1baef11ec9378ceee7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e6028287d0e476e80f2e59dde7dd58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b115f2842dc46fd86c817f23cd85627.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b3e735cce247c796b4d063db64c3de.pdf
    • https://static.usrfiles.com/ugd/77d535_0e5a82aab7b74fe2ba2b721d5f334277.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_134cabd9d7f249ca8cf0fda0e0e4cd78.pdf
    • https://static.usrfiles.com/ugd/b8c837_12857275daa547f985b9f3a9a749c05e.pdf
    • https://static.usrfiles.com/ugd/1d64af_dfc547e72f60461886d342bc0ac0e0d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e303e836fcfc4286a25534a1be6a9e77.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006531.bin
f178862d768540f0d21c2b7a84133b7153234053995ce0839004a536899e6f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 5036 bytes
font_01_sfnt_off00007641.bin
a50806b7f6d5fac306a210b5498a05ebd724ffec42d39b1c2bf0a20f191d3eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7641 12340 bytes
font_02_sfnt_off00009dfc.bin
aa1464b36b52ac156dd3ea04bc30a94b8376eaa6838293fad627926ea8981a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFC 16144 bytes
font_03_sfnt_off0000b2f6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F6 4324 bytes

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