Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b32422859e4ea4…

MALICIOUS

PDF

49.9 KB Created: 2020-08-11 00:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6a240c4f3bddc39a35e4b81627bb982 SHA-1: 42ad3d7c75c6ccf8cb4a111c47529530d4ae1a8f SHA-256: b6b32422859e4ea4a48475c4019e4a8ad8bf1cbec099c755790280337bd08d5c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, a technique often used to inflate search engine rankings or distribute malicious content. One of these links, 'https://ttraff.com/pify?keyword=black+butterfly+wattpad+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated.

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.com/pify?keyword=black+butterfly+wattpad+pdf
    • http://zajis.spiritearthreiki.com/uploads/1/3/2/8/132815028/bekiwa-bekupurumixi.pdf
    • http://files.morstargar.com/uploads/1/3/2/6/132696335/puruve.pdf
    • http://kufanexaz.addisonwilhite.com/uploads/1/3/0/8/130874253/raroxozimatu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/audyt_energetyczny_budynku.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/88656477604.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/sample_visa_invitation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0437/3771/0744/files/23355229864.pdf
    • https://cdn.shopify.com/s/files/1/0436/3537/6281/files/89814776688.pdf
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/stalking_jack_the_ripper_vk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/34330415395.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/76451823643.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/kejutazotebipazasulaxiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/bayesian_methods_for_hackers_cam_davidson_pilon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/ganimo.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_off0000773d.bin
c6c3e9d11cdaec187110780fb95797a5b9869f0dafc0994a2c4ed07099c5e708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 5036 bytes
font_01_sfnt_off00008888.bin
61f2ed39ff7a6089eba711d3a082310d200737b70c1a50e00d151cccf95ab83b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 10548 bytes
font_02_sfnt_off0000ac96.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC96 4324 bytes

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