Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daaacd47037a007…

MALICIOUS

PDF

47.8 KB Created: 2020-09-08 11:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a805391b6effb1d73d656252995a6912 SHA-1: 1accc91070ca7e57d4a07df290ee4f5b82e6e287 SHA-256: 2daaacd47037a007fd1a81b1d42a2da8b6acc370d09f61ffbd959de99809af7f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a deceptive document body referencing "Workday app for pc" and embeds numerous links. One of these links, https://ttraff.link/wix?keyword=workday+app+for+pc, is identified as a malicious redirector. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML_NYX_PDF_MALICIOUS score is extremely high. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely to obscure the malicious destination. The primary attack vector is social engineering through a deceptive link.

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.link/wix?keyword=workday+app+for+pc
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/apnea_of_prematurity.pdf
    • https://cdn.shopify.com/s/files/1/0461/6113/3720/files/5749917827.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/chiari_malformation_type_1_mri_images.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/normas_da_abnt_para_referencias_bibliograficas.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/75605281132.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/86437908249.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/creational_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/12788507953.pdf
    • https://cdn.shopify.com/s/files/1/0446/3457/0915/files/android_based_attendance_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/kapexalenafet.pdf
    • https://static.usrfiles.com/ugd/5f4192_ad7e3a3de44e4018b398235f93dcdf28.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_c12c17d6831247b7b78250bf017c92d1.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_0f2fcd6916cb4d85a61d56b392d725d8.pdf
    • https://cdn.shopify.com/s/files/1/0446/9476/5724/files/80908050690.pdf
    • https://cdn.shopify.com/s/files/1/0437/2113/0152/files/bharti_axa_life_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/luxusoxaxulosifikavipor.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_off00007d16.bin
271f7d5f97eee4b71b00ed172702c2a83fd3480805f6a3964ecfaa9ba86feac6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D16 5120 bytes
font_01_sfnt_off00008ead.bin
5ec2a4b79033807a917c701e3d0c80bd501d21e3b06b21f024a91390a687cb61
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAD 10444 bytes