Malicious PDF — malware analysis report

Static analysis result for SHA-256 2808937e5728dd10…

MALICIOUS

PDF

52.3 KB Created: 2020-09-01 20:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943cc711fcef78c18d2fe849db13ef20 SHA-1: b3e2a632e163b2deefccf4eab2de41d29c823c3b SHA-256: 2808937e5728dd10244c9d4f193033f0134250900fa3fe6f3108b39acea1d840
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.cc/wix?keyword=bunionette+deformity+mri', points to a known malicious redirector. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is driven by the link farm.

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=bunionette+deformity+mri In PDF document text
    • https://static.usrfiles.com/ugd/49be48_601ba8a6f6eb437ba8bff86fc587fe5a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f9392a70f8ec467386929bbfc7143704.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b68be_b8572d39ba2949f8b5db2d79794da118.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2834814971b8414ca577aa28b115deb1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3f066c0bc46c47048f988b9d4575c723.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8127dd_01cb83422e8a4deca293db5bac939ea3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8bbd7_56ebec7dea294a3f9e164b3ad0e235a9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_b8bf8bee8dad475e95776a5658c4c243.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1de29_d5f16128dafa4456b8ba37ae4caf14bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0fb39f26462b4bc6affe90b002127bdc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/913720_a334a34f09e3458aa5207d45edf98440.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9204ea580f5f44c6bc5d9c83bcc08aba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e16aa_f050fdea0c38474791c2e5da2382e94a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8acad3_1695d39f1f9745fd91a8611e660066d1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090b9.bin
ec2102bec3e2374746885d4da88802668e1d1beff02981616f971ff57dad8333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B9 4784 bytes
font_01_sfnt_off0000a0f5.bin
be344bbb7012e227e687e2f559fe9985e7ecfa18f23d822b27815d0d0d39d815		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F5 10376 bytes

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