Malicious PDF — malware analysis report

Static analysis result for SHA-256 5761e2e15cfc9b8d…

MALICIOUS

PDF

49.2 KB Created: 2020-08-13 22:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1421086f8ebafd3b4d5e24f12a2e479 SHA-1: 3af29388c5fd8970874d1e130a99830a2b1aac53 SHA-256: 5761e2e15cfc9b8d64dfb80eae3b0056ef2b3f865b36906f29bbb29a89cc077d
150 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier strongly supports the malicious verdict.

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=kinetic+vs+potential+energy+worksheet+middle+school
    • http://files.lilcongames.com/uploads/1/3/1/0/131070688/b0efdab16205b.pdf
    • http://wuziso.humecompost.com.au/uploads/1/3/1/4/131452922/4206123.pdf
    • http://files.classicfinancialsolutions.com/uploads/1/3/1/0/131070751/4133942.pdf
    • http://files.thecurrencymatrix.com/uploads/1/3/1/4/131406507/7090686.pdf
    • http://files.juliafeildenracing.com/uploads/1/3/0/7/130740026/63034cb7d.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/84845426799.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9605/files/77687422737.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/kotaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/23173002038.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/bosinusaragozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/warehouse_assistant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/5740524116.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/gojoxubulujuwamusidel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/bandit_algorithms_for_website_optimization_developing_deploying_and_debugging.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/52909319566.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/porujaxeliwuzu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/15580870594.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/59607475110.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/49686917664.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_off00007b67.bin
f80f60186816be1153ff23135f968d2e48cf45a98a312bad4b30c529137cbcf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 5776 bytes
font_01_sfnt_off00008ef4.bin
62db46d269882d1bad0528ec053610edbf40a03bcb09196766061d388a9e994f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF4 11428 bytes