Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed766c027e018af7…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 11:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a387efe9f8a6bfdb69cf02a916ee1bdd SHA-1: 5a36e5784b1a9c9e6eeb8e83c8c002a6810f3225 SHA-256: ed766c027e018af74f1eabfa6809f6390de45e11862a1ebef4d9b7f9715ceb4e
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.ru'. The document body, though malformed, contains text related to time conversion, suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links points to a link farm or redirection strategy.

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.ru/pify?keyword=hours+to+seconds+conversion
    • http://files.murphysheanon.ie/uploads/1/3/1/1/131164419/5570833.pdf
    • http://files.donnace.studio/uploads/1/3/1/4/131453268/weditoduvisojo.pdf
    • http://files.amayzingartistry.com/uploads/1/3/2/7/132712011/nutow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/bumetolagewetaxetewid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/wuketagabajukamamosobim.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/daratetinarajufunedavurar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6480/files/rujimoxana.pdf
    • https://cdn.shopify.com/s/files/1/0432/0945/7825/files/gajavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/28554128956.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/letofanal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/mijebowikaranevelimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/fujekugatuzasuxaguf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/62454611738.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/17734514921.pdf
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/wivonilopezaxegura.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_off00006c0d.bin
a6e8372bf4240353f2c467b67c9fd1b2e0e54de7e05b045f98d5965b05f82de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 4712 bytes
font_01_sfnt_off00007c24.bin
66bef1f73b5f814e4cbdf5e85d8ea39ff2d302807870cf3b41a32819bfd4e6b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 9992 bytes

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