Malicious PDF — malware analysis report

Static analysis result for SHA-256 265471fc45484533…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 13:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b66328c36e71bf92339c970fad6b91a3 SHA-1: 1b39ac94f728cbb960feb7c2a3af562d42589f59 SHA-256: 265471fc4548453380b55c6fb27bacab182c38d0a9f3fe11aac9de525cfb742d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=archicad+19+tutorial+for+beginners+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=archicad+19+tutorial+for+beginners+pdf
    • http://files.campandcoastal.com/uploads/1/3/0/8/130874524/zebig_susag.pdf
    • http://files.artstudiosanneke.com/uploads/1/3/1/4/131407364/sidifewefap.pdf
    • http://files.salmonslinger.com/uploads/1/3/1/4/131406149/bokef-tudisas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95936092566.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/auditoria_en_sistemas_computacionales_carlos_muoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/pawutiveniwojexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8759/files/kizixirikunir.pdf
    • https://cdn.shopify.com/s/files/1/0433/5304/7195/files/how_to_leave_a_steam_group.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/badomoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/guia_prtico_ilustrado_para_biomagnetismo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/xijoli.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/devededatisarexosus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/tivonubijonipejaguvaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/disujevuvije.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_off0000603d.bin
12c71f024a289dd749d0a05fff69c9e07641680ff1422a386dc86aaf1f382033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5752 bytes
font_01_sfnt_off000073c8.bin
982c66516e226bedc44f23b0209fdf4a04dcf97531d14e6364295030fc77bf26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 10304 bytes

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