Malicious PDF — malware analysis report

Static analysis result for SHA-256 237b6fbac6cda9ce…

MALICIOUS

PDF

38.0 KB Created: 2020-08-15 20:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68707e8e9d6febeb5635eb1da7fbf522 SHA-1: 849d121f1c2a90c6a75905ab77f3ccfd063cefda SHA-256: 237b6fbac6cda9ce8952166bb19bb3e3b6caf7aee61f8b430d1addcecd08c38a
140 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=instagram+videos+private', which is presented as a lure for private Instagram videos. It also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final destination. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, likely part of the link farm. The presence of a callback phishing lure heuristic further supports the social engineering aspect of this document.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=instagram+videos+private
    • http://mojino.mkyrobocomp.com/uploads/1/3/1/3/131380177/80332a50.pdf
    • http://files.leicester.church/uploads/1/3/2/7/132712015/7922920.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/fezozefap.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/33662519819.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/baixar_reader_gratuito.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/80769170944.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/34356930647.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/49268080948.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/megipaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/spectral_clustering_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0436/9537/4489/files/scope_statement_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/functional_analysis_book.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_off00005851.bin
4842bdf77e723abc251b8e36b01e63bbfb49134db24661498046aef463513c3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 5244 bytes
font_01_sfnt_off00006a0c.bin
f462510cf9d9e98c539def0b6879dda9ef88d33d70565bc8033e5477f60a7baf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 9744 bytes