Malicious PDF — malware analysis report

Static analysis result for SHA-256 9299a19f9e1259f9…

MALICIOUS

PDF

33.8 KB Created: 2020-08-08 16:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a278d3f6421d8136c2bb185fa843aa83 SHA-1: f63e803df972a18422ae2d803e70b3dc8b6e5b45 SHA-256: 9299a19f9e1259f95750b447f77145545899d4d0e8ffa7218f6183892dd96527
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary link pointing to a known malicious redirector. This suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of direct payload execution.

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=cornerstone+chords+pdf+d
    • http://files.happyhealthymentalitee.com/uploads/1/3/0/7/130739443/2659999.pdf
    • http://files.jewelz4you.com/uploads/1/3/0/7/130776498/388f4e90a61cd3.pdf
    • http://files.dixiemacuisdin.com/uploads/1/3/1/3/131384255/wexolaro.pdf
    • http://files.rickmolloyart.com/uploads/1/3/2/6/132682790/kisifitol_jowoxibo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/89323270990.pdf
    • https://cdn.shopify.com/s/files/1/0449/4698/1023/files/jotegudilazotogami.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/piwiweme.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/argentometric_method.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/36971587535.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/90098532850.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/xivazelomijuwirudowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/la_bella_durmiente_original_hermanos_grimm.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/kebejopixasesebakozoxerex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0137/9996/files/97717150885.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_off00004911.bin
74acc9bc17b10ce58ba7c5c642ebfa4cb5e426c2cd30a14383455dce9d054232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4911 4908 bytes
font_01_sfnt_off000059ba.bin
29641455ec75f0fdd7ed85002500365f1286dbc247e9251b0e07cce4bbfe0391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BA 9556 bytes

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