Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0645d890c9c9dd…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 02:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4822910f5fdb64ca4eb72ca75eb8d00 SHA-1: cced53d9c3737b7205acf7a01453b486980f798f SHA-256: 8d0645d890c9c9dd8bd86074a48f8a963837a8db57e679721690943ab2a82f3b
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a piano exercise PDF. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a reference to the malicious URL, suggesting a lure to a malicious site.

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=boogie+woogie+piano+exercises+pdf
    • http://files.remotesummitstories.com/uploads/1/3/2/3/132302859/furugerevolimo_gopubugutaraju_wotesobi_nujug.pdf
    • http://tizizi.goldencrossagservices.com/uploads/1/3/1/4/131438641/19616.pdf
    • http://files.jocelyngolden.com/uploads/1/3/1/1/131164440/ruvireladow-nabolegaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/45455055973.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/vadifegutuxotixixurirazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4418/files/23389681522.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/38560699322.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/xenamavezexono.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/sri_lalitha_sahasranama_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/autobiography_of_abraham_lincoln_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/46283468649.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/witiwusokurigak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/sorinifulodiviwiguwo.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_off00006362.bin
70a3f6ff22588f8b21f815c6800395ba5e48e93e9082d475649e30965b3fdbc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 5500 bytes
font_01_sfnt_off00007647.bin
dd0af1ebcc3501c81ff76893982252a54cead402dcdad6ae4fdb4fdfeb22f283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 10256 bytes

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