Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92d6942ff92b73e…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 12:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b78f944a06f57c2060de544d3428a3 SHA-1: 93ecf5caecba6da5c3a4ebd4918f2f8cff442b12 SHA-256: d92d6942ff92b73e313637d30864ce606319e0bf7f4dec02f9a640dae8ff8215
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of external links. One prominent link points to a known malicious redirector, 'ttraff.com'. The ML classifier also flagged this PDF as malicious. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended lure.

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=403+forbidden+nginx
    • http://files.ridgeclinicairliebeach.com/uploads/1/3/2/3/132302995/5810e24ce15aa.pdf
    • http://files.indianagolfsolutions.com/uploads/1/3/0/8/130874067/lomipesun.pdf
    • http://files.jennycoffeycounseling.com/uploads/1/3/1/8/131856624/5191159.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/dunizapifofugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/remalubodador.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/82066291358.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/48427569900.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/rehearsal_psychology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/kewufuribujusex.pdf
    • https://cdn.shopify.com/s/files/1/0439/3838/1992/files/79780184090.pdf
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/52460214544.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/nudadebikowadibijatoman.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/pupesuwefedakusudokuxino.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/70602830482.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/wiwaribifajebugivo.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_off00007273.bin
882581bf15d74d846c7e2d9371bf3758123ee4388975e91f77d07bba16eaffdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 5164 bytes
font_01_sfnt_off00008420.bin
86cdaee4492ee3047d2b5d132ca19a92c04fad8706cee550d91b49a5434f5576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 10920 bytes

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