Malicious PDF — malware analysis report

Static analysis result for SHA-256 9155ee2a5661b104…

MALICIOUS

PDF

44.4 KB Created: 2020-07-26 00:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 600015c53226211dc6008cb6a7ba96ea SHA-1: 8d3db8387207803767813b9f3bc7433aed018af5 SHA-256: 9155ee2a5661b10485efd854b14fc372494a6c1dcfa891f126fcfd9f9eabd6c4
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://ttraff.cc/wb?keyword=ghostscript%20reduce%20pdf%20size', is flagged as a 'PDF_MALICIOUS_REDIRECTOR_LINK'. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for SEO poisoning or to distribute further malware.

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.cc/wb?keyword=ghostscript%20reduce%20pdf%20size
    • http://files.clarencecoastdbclub.com.au/uploads/1/3/1/3/131384589/megezawuwodow_radivimanudo_nenadiboruxitob_pazeje.pdf
    • http://files.thecollegefocus.com/uploads/1/3/0/9/130969298/8733253.pdf
    • http://files.mediasourceamerica.com/uploads/1/3/1/8/131856125/bodegofatugiboru.pdf
    • http://files.gravelroadhome.com/uploads/1/3/1/4/131438329/masanolirifizovoku.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/59430829241.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/nasegulamapokotasuwero.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/mivikurejesifawufarawod.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/terabotevuwakidabopalajaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/98834573941.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/5351087286.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/16797609135.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/25733906240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/berujixawajibexuxutuzogar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/97514552540.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/niwusuwexubukukuvawimuru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/gigonedesupu.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_off00006d04.bin
26f17d60e9d295c904b2804067b225dd7f9650c42a5c211adb9969d11d786150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 4860 bytes
font_01_sfnt_off00007daf.bin
dca760b908321e89555af7a2d60b5fb7560ca1c5fdc3e1fa0e9b602d6216a27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 11460 bytes

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