Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea5add3285ea16a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 23:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69cdb7b9b75fc14bea292cf29eb96718 SHA-1: 62501e3ce1a6d376188f3476a584db9e1b779c6d SHA-256: 4ea5add3285ea16abdbe31bf7fcc01567f4d68097c33fbeeaa1b32120ce1f523
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=online+excel+sheet+login'. The document body, though partially corrupted, contains text related to 'Online excel sheet login', suggesting a phishing lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or traffic.

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.ru/pify?keyword=online+excel+sheet+login
    • http://files.treeservicewichitafallstx.com/uploads/1/3/2/7/132741555/zegigevujaguf.pdf
    • http://files.cornerstone-civil.com/uploads/1/3/1/3/131378950/254407.pdf
    • http://nemuk.houndshangout.ca/uploads/1/3/1/4/131453133/jobasukoxavux.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/71638046181.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/3174967767.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/6848819212.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/xepodofijafafitivam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/free_rotational_symmetry_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/15585654070.pdf
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/72604866113.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/system_administrator_interview_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/google_photos_api_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/mitofedufowive.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/adobe_failed_to_connect_to_dde_server.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_off00005996.bin
c73d83a28220947148ec534d89bef5aab426a31db752421b8fe3aa33f9190c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 4852 bytes
font_01_sfnt_off00006a21.bin
b285bb01aac234bdc746eed30ee72b93709a63ef042a785d58ae1c78b97cb761
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 12796 bytes