Malicious PDF — malware analysis report

Static analysis result for SHA-256 4933841c0640fa28…

MALICIOUS

PDF

43.1 KB Created: 2020-07-29 21:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d13dd7968d91c61e9c4b2bcfd365f1c SHA-1: b8047d4ead26931bd17f3866fabbf0f932c73721 SHA-256: 4933841c0640fa2800ec96ee83be60f83ca3f4260815a67e5938787c5322553e
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a watermark PDF editor. The link leads to 'ttraff.cc', which is known malicious infrastructure. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content. 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=watermark+pdf+editor
    • http://files.noahsteinman.com/uploads/1/3/0/8/130874354/poxeburo-zekux-bexuxos-zomiv.pdf
    • http://files.bckamsler.com/uploads/1/3/1/3/131379375/gazatebukez_logezaril_zewexanen_kesutufefow.pdf
    • http://files.minasabritabrizi.com/uploads/1/3/0/7/130775732/palema.pdf
    • https://cdn.shopify.com/s/files/1/0428/7581/4047/files/mujopenerimutojepedow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/xogesoler.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/72802759584.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/muwevopatenuvaleforatawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/sanumizig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/9943971267.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/76250769548.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/zomamanegovozolodon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/tozebefilitetegeloruratuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/36230266081.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/monogetevinavomamet.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/
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cde.bin
db717ebc582ff30e0beaffa382bc5cb08744d8b8d923a7037334f570ae42d405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 4736 bytes
font_01_sfnt_off00007d0a.bin
292b5a6d5fd8027c575c6a69e206f7ab14264a6b1fd8e51f6c2feec4515578c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0A 10088 bytes

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