Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb3212390029d6b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 00:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aadfabac3a902d5fdea5530f1840edbc SHA-1: ecf4f79915f23fc278bc51b076247677dedb6d36 SHA-256: bcb3212390029d6b71e5e09ffe01987e326ab47f72ed1852ff7532820d58b9ff
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=star+wars+visual+dictionary+pdf
    • http://files.jsarchiveconsultancy.com/uploads/1/3/0/8/130814245/xemuzisisojise.pdf
    • http://files.thuruthoorsinaimount.com/uploads/1/3/0/7/130740173/68bc4f.pdf
    • http://files.cruzing4photos.com/uploads/1/3/0/8/130874211/59ae8f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/pamowoperepagow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/gutewux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/17004429175.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/32200153267.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/sulobobar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/pokemon_hilda_bondage.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/60169234704.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/remove_characters_from_string_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/32076137193.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/14460053816.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c0a.bin
2a0cf3c43fe1e3c84592ca2c1a47d1870fe01a813630fdf9920088c80abf7145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0A 5504 bytes
font_01_sfnt_off00005eef.bin
9374adf39c66d47a423814557680c3b669a899c04a55a57bdfc3fa76ee255693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 10588 bytes
font_02_sfnt_off000082ee.bin
fd8bcd6c9d5653f5ca42e7a0da8c37bb11293382d085f187bfc5f0104eb230c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EE 16832 bytes

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