Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e771a75a951e02…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 01:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6aac525f885bbc75ddc8f049360a7c9 SHA-1: a7aa871c9d05bac0f5ad24365887353f5e0fe03e SHA-256: d5e771a75a951e0208e3649cde598d78edd46225fed8f7501bcc22b8d3e6a249
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with the primary heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=computer+architecture+history+pdf'. This suggests the document is designed to lure users into clicking these links, likely leading to further malicious content or phishing attempts. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic strongly indicate a malicious intent to redirect users.

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=computer+architecture+history+pdf
    • http://files.edinburghlocalmod.com/uploads/1/3/0/8/130873820/penevipu_sinuveva_kipunaremi_belax.pdf
    • http://files.baddogfarms.net/uploads/1/3/2/8/132815298/9343625.pdf
    • http://files.charlottespurpose.com/uploads/1/3/0/8/130874489/zetarosara_zokesuwuk_tavewamilibav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/41623179615.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/80570155439.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/99627922475.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/65822851973.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/698583268.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/60310216380.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/nipofowebesoso.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/76834784577.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/lidik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/css_crop_image.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/33460786830.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/85039516114.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_off000072e0.bin
fa20eed5b3470343ce2d9011e995bff51a57a5fe6ed61d7dce4228a7af73d8b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 5368 bytes
font_01_sfnt_off000084fb.bin
4b14547b42c021057cde7997c04aa825262de09d2001db4c9fd08e2a435548c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 9980 bytes

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