Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20e2b72c50397c8…

MALICIOUS

PDF

46.0 KB Created: 2020-08-22 10:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a79629192685730b4c435d0e92b89f SHA-1: 6b637dae168e740596b5d93c0ff6a1f8d6081ae3 SHA-256: e20e2b72c50397c8158d8dc50d165ad9e51351d7831ab3d1b72276be8818949c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=dax+johnson+savior+sheet+music'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation effort to distribute malicious PDFs. The ML classifier strongly supports the malicious nature of this PDF.

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=dax+johnson+savior+sheet+music
    • http://files.jonathanmichaelcyrus.com/uploads/1/3/1/3/131381640/jetaruw-mukuwoderaxeluf.pdf
    • http://xunixivi.ozgurince.co/uploads/1/3/1/8/131856543/tuguzutanoxok-jafis-lutirikatenuvon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/fosukifaja.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/6480899061.pdf
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/vapuwimasuwizogonulix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/gexajilifewigol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/vemopodifinusopamikiwak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1199/files/84849621482.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/biography_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55166802931.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1554/files/82577665456.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/3285536012.pdf
    • https://cdn.shopify.com/s/files/1/0448/4923/4081/files/brunner_and_suddarth_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/magazobisurikimukogut.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_off00007718.bin
1d8dda36385210fee740681d762b4ae1eec754be20bbe2efbecc07a912f29677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 5208 bytes
font_01_sfnt_off000088b1.bin
2346bef7cc10a482572cebb9ddd1c660cef0c5699adbc3bfcde97ce9f4c027e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 10168 bytes

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