Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e99bfb507602e5…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 04:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98cc919e3176d048a3569083cb380c54 SHA-1: c646641245884cbdd6651e184b769c85d6979396 SHA-256: d6e99bfb507602e5577a85eb73177df5c44733256ffddcc8647fd0067aae8823
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for 'Westworld theme sheet music piano pdf'. This link, ttraff.cc, is known to lead to malicious infrastructure. The document also functions as a link farm, directing users to numerous other PDFs, likely to obscure the malicious intent and spread traffic. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=westworld+theme+sheet+music+piano+pdf
    • http://files.lonelymountainfilms.com/uploads/1/3/1/4/131438541/1c936c2f04f95.pdf
    • http://files.tabersafehaven.ca/uploads/1/3/1/4/131453144/nokawuwutosozo-xeraz-zijununozezitod-kegonamawi.pdf
    • http://files.psychicspiritreadings.net/uploads/1/3/1/8/131856186/lewotedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0453/4242/5243/files/principles_of_genetics_by_gardner_ebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdf
    • https://cdn.shopify.com/s/files/1/0429/2663/7223/files/english_grammar_diagnostic_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/oceanography_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/xepefogamerakewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2578/files/50736078810.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/9231329549.pdf
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/probation_officer_exam_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/36231213419.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/78030327666.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/46393596341.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/12983103560.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_off00005f33.bin
d803d8f13ee8e80204a22b1e88a7f63844a1353650c2b69901511a6df35f1bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 5500 bytes
font_01_sfnt_off000071d8.bin
24e03817a5c5d67445d48c2287e826996f39af5c057443351735ca418f1f7b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D8 12292 bytes

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