Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a0e4865d83527f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 19:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b682332d1c645857bc0ec85610480fa3 SHA-1: 7bf81789c58cd23373d07993ed21a2357b7f7cde SHA-256: 25a0e4865d83527fde84263201391c1893bf1ea071dbe3f67482ad170318a9d1
150 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.cc/wix?keyword=rick+and+morty+avatar'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL and references to 'Rick and Morty avatar', suggesting a social engineering lure. The presence of a mass external PDF link farm further indicates malicious intent.

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=rick+and+morty+avatar
    • https://static.usrfiles.com/ugd/5d2cf3_d9279805f63d42099c78472b948625c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3a5991bec5e4334a69d2fa0767e093f.pdf
    • https://static.usrfiles.com/ugd/e1d12c_5f539c633dd54e2593c7cd1c9c5d2cfc.pdf
    • https://static.usrfiles.com/ugd/0c268c_d5d6d7078ce349bbb2136f3b1c739038.pdf
    • https://static.usrfiles.com/ugd/d94ae5_9b17128e6d374d108ce0b4baf6f3cf98.pdf
    • https://static.usrfiles.com/ugd/f515ca_3e833b35cbc6455e938b68b3b5d8f81a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c08e2b32d974bb4bce95ae801a6f177.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bda2b2792294a46a4d80023fb5bdc56.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/27904107876.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/fraser_ptolemaic_alexandria.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/46842192822.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/search_by_image_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/wow_classic_baron_longshore.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_off000055ad.bin
c81baed7540790887ceca3c8f9812db5d4a926855678e5a78b2bba70aead7669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AD 4776 bytes
font_01_sfnt_off000065d0.bin
8898bbe5518e6700e2a54ad283c9d1c0c824e5b5a1c6244bcb601be1f19d9b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 10164 bytes
font_02_sfnt_off00008886.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 4324 bytes

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