Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a3ca32f6c786fc…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 09:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad8f9540f8c22b41880d0240b1826260 SHA-1: 38140165adf95fa81208482cd1935055c18e483c SHA-256: c6a3ca32f6c786fce233fbae380f92e2e2d442c83cfff24c1b554539c91f3bac
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary malicious link identified is https://ttraff.ru/pify?keyword=ciaphas+cain+emperor+s+finest+pdf, which is flagged as a malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially to obscure the true malicious intent or to distribute further malicious content.

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=ciaphas+cain+emperor+s+finest+pdf
    • http://ragorefi.phoenixtattooandwellness.com/uploads/1/3/0/8/130814328/sixijidaronafe-sijegawix-rijepiv.pdf
    • http://xiranid.rogueconditioning.com/uploads/1/3/1/4/131406893/2751a610.pdf
    • http://files.barnontheweb.com/uploads/1/3/2/3/132303209/c6c900fbf902c31.pdf
    • https://cdn.shopify.com/s/files/1/0437/3889/0394/files/electric_guitar_vst_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/prova_arsesp_2020.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/minecraft_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/mopikiweden.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/64050893546.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/island_of_adventure_park_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/pokifib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5521/7814/files/36920362653.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wosutojereveritaletobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/zetuxagi.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_off00006336.bin
62d0e40ba26edd4f2601b541cc6685ef7536c3eb1a3f0bdb1d6388b838409750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 5268 bytes
font_01_sfnt_off000074ea.bin
e1d5485664170239a5065e3b69cc13457dd361491bc4d0e4b6f4323f61b5d23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EA 10072 bytes

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