Malicious PDF — malware analysis report

Static analysis result for SHA-256 397c4379edd8075a…

MALICIOUS

PDF

44.3 KB Created: 2020-09-05 10:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013fb51ed4858a2c0a4c261e751c9749 SHA-1: 8d4a01b9fc14115eed6abfa7a5c00800d9b351b9 SHA-256: 397c4379edd8075aee7aedf3f2745cc94d4afa7025a8dd22347343d5b9764f3f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `https://ttraff.cc/wix?keyword=conversions+sheet+pdf`. The document body, though heavily obfuscated, contains text fragments suggesting a "Conversions sheet pdf" lure. The presence of a malicious redirector and the link farm indicate a likely phishing or SEO spam campaign.

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/wix?keyword=conversions+sheet+pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/49530650896.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/tecnicas_de_alimentacion_enteral_y_parenteral.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/zorivomifepekobomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/14444633795.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/32601506987.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/copy_banner_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0438/3955/3696/files/najoxamesuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/tablet_weaving.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/tajoxosavowuxobenok.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/fopozufelaverekef.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/6104552621.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4679/files/6321189425.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/ferufewunabix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/2008_honda_shadow_750.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/kijudawagemureb.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_off00007181.bin
8f74b7302e54654b59eaca84381d44eb6dd90b96fbb2dd2baf648af6cf924981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 4852 bytes
font_01_sfnt_off00008206.bin
11477931cc66c7181d49a20744f53a12bcfc0c8bbb8a5fbeff23a5483e28e200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 10008 bytes

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