Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc368e059855f32…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 08:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c04f18252336031f8c3b21832e30c0c7 SHA-1: 94b93edbfc50cff67af94592e26205e63ff8fd35 SHA-256: 1bc368e059855f32035e584e2a8943a945eaa87e29c36f6a6dee9030c898a334
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=affidavit+of+attesting+witness+form+oregon'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL and appears to be a lure related to legal forms. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=affidavit+of+attesting+witness+form+oregon
    • http://files.brendachrystie.com/uploads/1/3/2/7/132741476/zeraje-telozusivexogut.pdf
    • http://files.leahbealdesign.com/uploads/1/3/1/4/131407918/5286187.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/kabitivibopewodawokorenij.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/interview_questions_on_c_c_and_java_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/mubuzepisexe.pdf
    • https://cdn.shopify.com/s/files/1/0451/7367/0037/files/tips_for_job_interview.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/5515044819.pdf
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/quality_assurance_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/mozijivejosirena.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/cisco_ise_2._2_vm_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0519/files/kewokalafobovikanedugelup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/vineland_3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/adobe_acrobat_reader_full_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/92176260864.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/access_consciousness_clearings.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_off00005c91.bin
457dd7dcbdd409ff436e7f92be5856ba19a87796db761e5d0372a575bacf0c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 5336 bytes
font_01_sfnt_off00006eb6.bin
ca393f43ff59d82f2af6fca4f9a96783276d22fa1d68abb37f19770c5ec1688b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB6 10112 bytes