Malicious PDF — malware analysis report

Static analysis result for SHA-256 56663a2477d68a90…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 16:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870be2949d86d3aa87d0f6289139d695 SHA-1: 58e4b9d715ac7a25fb92c925f88aedcdd56c6bdd SHA-256: 56663a2477d68a90a46219c2533f55656d0c3812f404c72ea32b5a51ae390959
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on static.usrfiles.com and cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.cc/wix?keyword=architects+scale+ruler. The document body text, though heavily obfuscated, contains the same lure text and the malicious URL, suggesting an attempt to drive traffic 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.cc/wix?keyword=architects+scale+ruler
    • https://static.usrfiles.com/ugd/b8c837_1ddf6472112d4a6c982e3dcf8defaa08.pdf
    • https://static.usrfiles.com/ugd/432b07_647c79d2badd4e4fbe144732a9aa31a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d50b7e52fc346ba9299f91c652bb6f6.pdf
    • https://static.usrfiles.com/ugd/d55797_aad83cb436ec4f9092405b899f2a7317.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/sivubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/rukapa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/o_offsite_operao_de_cpia_de_segur.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/wudekof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/pascal_wager.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8791/files/galuxuvatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/excel_vba_userform_vlookup_named_range.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_33af41465a1244378ad242ba992d8769.pdf
    • https://static.usrfiles.com/ugd/cf79db_f70fbe394f5d4c12912c09d4cd2f7392.pdf
    • https://static.usrfiles.com/ugd/eb6612_4727fb3f4aa3478ba746886127112e4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0580a59b5d24efdaaf91aa64aa08d9c.pdf
    • https://static.usrfiles.com/ugd/dd4472_982d176cd0b141eb9ad77706f43204a1.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_off00007e4a.bin
5491e831f1ca0f581e5563b321f818b3547252499f64a2f33dae7d96bd4cbe5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4A 4876 bytes
font_01_sfnt_off00008ecd.bin
b4eb836a36bc439bcbef301d305a188ce816137ff785a0d9b045b3f7a360694d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECD 11176 bytes

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