Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5aaacf64ea313d…

MALICIOUS

PDF

59.8 KB Created: 2020-08-28 06:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad39c781e9b6af915db3f8a820448aa3 SHA-1: 84cf058caf03b18c03e81a539af17b46a5ad6f1b SHA-256: 7d5aaacf64ea313d9d85cf4c719153d187ef8c542164ac7cd46448f0f87a46d6
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.link/pify?keyword=kekkei+genkai+meaning. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a lure to external content. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=kekkei+genkai+meaning
    • http://files.ourvillagefarmacy.com/uploads/1/3/0/7/130775892/fudivimoniden.pdf
    • http://files.carolynamurao.com/uploads/1/3/0/7/130739688/wipugezowomonewi.pdf
    • http://jakagu.nlcvallejo.org/uploads/1/3/0/8/130814933/2427103.pdf
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/93083858672.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/56903237330.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/uniformly_accelerated_motion_equations_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/44334714477.pdf
    • https://cdn.shopify.com/s/files/1/0437/4308/4705/files/eu_whistleblowing_directive_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/cute_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/caldera_forms_save_to_database.pdf
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/17049020685.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/jurnal_bilangan_kompleks.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_off0000797f.bin
d8b36c7bcbd2f012ce8696e9a390e33d76070b706e75f5c53cf3777e651b23e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 17248 bytes
font_01_sfnt_off0000afb7.bin
942e8a358fcedfe052a68126c097c72dde59e4651c96172de64b14fc9b328338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB7 4732 bytes
font_02_sfnt_off0000bfc4.bin
f0ad5838feacd91e2c9f546ad2a5d90b6bcb63e77ad85daeb54a3329bac311f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC4 10496 bytes

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