Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b18ae5290eabe2…

MALICIOUS

PDF

53.8 KB Created: 2020-08-31 16:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b7f2fd1097c8b6dbe46afb680eb6d1 SHA-1: 29153bb51694b0a6d63364b04f9c9995625dcbe6 SHA-256: 82b18ae5290eabe2e5c072f5c20118bb398b710f779a1baff17e7955f8874a5f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=alphago+zero+nature+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is 'https://static.usrfiles.com/ugd/b8c837_d1f77c90893a4412aaa3473ad3b14f38.pdf'. The document body, though heavily obfuscated, contains fragments that suggest a lure related to 'alphago zero nature pdf' and includes the malicious URL. The presence of urgency language further supports a phishing or social engineering 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=alphago+zero+nature+pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f77c90893a4412aaa3473ad3b14f38.pdf
    • https://static.usrfiles.com/ugd/269bb8_f271e8e977f54148b93f044a78dd1123.pdf
    • https://static.usrfiles.com/ugd/a298ce_2dc22fddd7304bab80cefc01ef3ca36a.pdf
    • https://static.usrfiles.com/ugd/b8c837_809096bc45d647aabe6144a7a1001dca.pdf
    • https://static.usrfiles.com/ugd/83e24f_5f7e48ae1e094a8cb9d8996b915daae2.pdf
    • https://static.usrfiles.com/ugd/0049ca_41348285e8994b0284a645204bd3bea0.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_527d0ad3f25e4cefb632a50396a6db8d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/69749236167.pdf
    • https://cdn.shopify.com/s/files/1/0438/1147/1522/files/71967790646.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/68903795707.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/19647198300.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/paper_bag_size_template.pdf
    • https://static.usrfiles.com/ugd/ee4a13_0d424a50e9c3410f994769f29feab3e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0c77853acd42b8b06dd8b4745f19d7.pdf
    • https://static.usrfiles.com/ugd/9e14ca_06d2fb8b8f104b518f21e450ad8212e4.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_off00006a71.bin
61dd1ee2c0803c409912265adbb0f52753c30e2de0d3790fe0c36e05461632be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A71 8420 bytes
font_01_sfnt_off00008698.bin
6730387df9b9cfccebeb61b920534a86fd654a18639f52f3b5b48b75341fc0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 4996 bytes
font_02_sfnt_off00009797.bin
6023f783c1b23b8ecf5253a44bf81d91616b49e385a8a66b5294818d70e91c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9797 10636 bytes
font_03_sfnt_off0000bbe3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE3 4324 bytes

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