Malicious PDF — malware analysis report

Static analysis result for SHA-256 9337fef9b430a88a…

MALICIOUS

PDF

73.5 KB Created: 2020-08-24 20:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3fd42ac98e159350c1448ffb1d8b96 SHA-1: 948bd5c8a78414e2858b691d9a4c1f8930082698 SHA-256: 9337fef9b430a88aa2f6a5f82b3b4c4749a8a0b795d0e0fb9ce680a2dcb53adc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector.

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=c+k+d+ka+full+form
    • http://wakej.thepreachingpoint.com/uploads/1/3/1/4/131483361/c2947be6.pdf
    • http://files.oombaga.com/uploads/1/3/1/4/131437443/7095011.pdf
    • http://kufowiram.homewoodmanitoba.com/uploads/1/3/1/6/131606739/wupej.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9953/files/libro_biopsicologia_john_pinel.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/45007498350.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2803/files/30083315081.pdf
    • https://cdn.shopify.com/s/files/1/0431/7459/2668/files/ashoka_the_great_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/6833/2968/files/rokizexizefigujasebotoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/sholawat_burdah_dan_terjemah.pdf
    • https://cdn.shopify.com/s/files/1/0437/9118/8117/files/dakenikebelajaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/jumutininikaxoze.pdf
    • https://cdn.shopify.com/s/files/1/0438/1809/0653/files/58866617590.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_off0000d946.bin
7a93d06ab7d63ac38dd6cdafc727854a8a773baea2770a8ad6dc53b29c21a3ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 4844 bytes
font_01_sfnt_off0000e9a8.bin
cb245109971f6bb15fc3d677ee03e979b4f5f22bc818ad9409aabdcd6080a4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 15188 bytes

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