Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3add0fa94d907e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 04:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ea068030d4fcd455f84825e5d4187ea SHA-1: f4d4f07fb7cfad178db931cdf055059f718282a5 SHA-256: cb3add0fa94d907e4cc21e079fef1347f584d6479691e8cc8e08796d8591d99a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=cabal+online+2++free'. The document body is heavily obfuscated but contains this URL, suggesting the document's primary purpose is to lure users to malicious infrastructure.

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=cabal+online+2++free
    • http://dubab.korensullivan.com/uploads/1/3/1/4/131483453/pesuragiko.pdf
    • http://gufox.manonscuisine.co.uk/uploads/1/3/2/6/132695829/doxokonowuwalu.pdf
    • http://files.deconstructedclothing.com/uploads/1/3/2/6/132681992/xodagol_mojur.pdf
    • http://files.walkwithgantz.com/uploads/1/3/2/8/132814427/cd68a5ef9094.pdf
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/accounts_payable_interview_questions_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/advantages_of_bilingual_education.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/85830095212.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/surething_cd_labeler.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0065/files/matricom_g_pad_bx.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/37785969425.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/lakamugifadinusujudipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/43773714455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/munakewofanexasorexudab.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/24079011782.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/sakipakisokoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/android_name_id_app.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_off0000599f.bin
452db08f086645f0c93dca651649a6bdbdb243f867026d31b7ec67837e7df9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599F 4760 bytes
font_01_sfnt_off000069e0.bin
143e7a8e6c71f0fa8b34f374baedda2a4b50240917acd082b76fb0eae1bbe5d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 16648 bytes

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