Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12b3a564a27e8ee…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 15:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020f80e6f9420618592f7c1e963d0724 SHA-1: a4e243df226356f132f62ccf4f1b8e776181016a SHA-256: c12b3a564a27e8eef86b2002c025a42a7b69536863981f4cf6e0f34526336e58
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=equipment+rental+agreement+contract+template', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs, likely an attempt to obscure the malicious redirector.

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=equipment+rental+agreement+contract+template
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/pokemon_y_tm_locations.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/23016736736.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/bijapubekugikopisinu.pdf
    • https://cdn.shopify.com/s/files/1/0464/9441/7064/files/baofeng_uv_5r_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/monabibugiguwubazew.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ac85aa85a6c4456be04a1ff789b1937.pdf
    • https://cdn.shopify.com/s/files/1/0437/2827/3562/files/email_on_behalf_of_someone_else_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/339096988.pdf
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/12115125031.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/92002596979.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/make_form_fillable_without_acrobat.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/poe_prophecy_wand.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/43885901022.pdf
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/get_android_messages_on_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/jidulolegezefisopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/vukaxiponopafiveju.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_off00005c5a.bin
8a14df3b91f8fc996196f0be6c80712f0ec96bb580420d7b83561f0dd92d9052
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 5160 bytes
font_01_sfnt_off00006dd6.bin
3be51542d5d678ed683b9cb4c8151c5b57022c3af1cdaddc1a4ddfdd071774d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD6 10300 bytes