Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb221b8e76d9651…

MALICIOUS

PDF

45.2 KB Created: 2020-09-10 02:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02c1e281283baad35173081fafcef89d SHA-1: 5d4e32156c8352385734550cda5a74bf470b99f1 SHA-256: dfb221b8e76d9651e16bcab7951af2fc21b32c3776318ceab5294da2920fc471
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body text and the malicious URL suggest a lure related to finding duplicate data in spreadsheets, likely to trick users into visiting a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a malicious intent to lead the user to a harmful destination.

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=find+duplicate+data+in+2+excel+spreadsheets
    • https://cdn.shopify.com/s/files/1/0458/5537/5513/files/case_simulator_2_mod_apk_1._79.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/tixikewunopuzivag.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/89582427094.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_457dbeab22b1406a9d295acec8dbf296.pdf
    • https://static.usrfiles.com/ugd/50c35f_aacd47dcb3c5410593d180613c815954.pdf
    • https://static.usrfiles.com/ugd/bfd504_c3ef317004064319ba5f4b79e1b8bbb2.pdf
    • https://static.usrfiles.com/ugd/6cf804_105eca60f993455ebf83128de1c4a20c.pdf
    • https://static.usrfiles.com/ugd/afbef4_8f6fce9e2f8d4c28bd5efb7152c7588a.pdf
    • https://cdn.shopify.com/s/files/1/0448/2433/0402/files/adjoint_of_a_3x3_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/46063995805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/bacterias_gram_negativas_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/kimapokibajajipojamulefi.pdf
    • https://cdn.shopify.com/s/files/1/0451/7330/9589/files/23306663520.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/20010624203.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/renaissance_periodization_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/veterinary_cytology.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_off000072ac.bin
7804bf4a23211dfa8373f4d8d882ca5e13f340f596f29c1ed9e8b69ba0670f7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 5316 bytes
font_01_sfnt_off000084bf.bin
9faa444940e5308950e9ff4c3f30d1b21b3311996fdcc65a654322493dc6685b
pdf-font-stream PDF embedded font (sfnt) at offset 0x84BF 10128 bytes