Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25fec8dd1a41685…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 05:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3ad5d1653d8daafa0f5affe4320e1c SHA-1: e81d9e96733f3edd04adc914bff7a7a77d722628 SHA-256: b25fec8dd1a41685e4881ce8f88daf43ec99812333c63b6e716b86703795d66a
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as free music content. The primary malicious URL identified is ttraff.cc, which is known for redirecting to further malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a SEO poisoning or link farm tactic.

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=music+online+free+mp4
    • http://bakofok.ellisbirdfarm.ca/uploads/1/3/1/1/131164250/zipukesamem.pdf
    • http://files.youthartscenter.org/uploads/1/3/1/6/131637190/7058856.pdf
    • http://files.gratitudeandgrace.net/uploads/1/3/2/6/132681392/1054832.pdf
    • http://tasani.mystorycommunity.com/uploads/1/3/1/4/131453133/1e6e2d5066.pdf
    • http://files.isimplyloveit.com/uploads/1/3/0/9/130970003/1d3e4858ab74.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/introduction_to_the_catechism_of_the_catholic_church.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/15039191551.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/movodatuwevezevudezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/wikowarajedatenawotireke.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/balopeguw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/journal_echourouk_algrie_d_aujourd_hui_algerieinfo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/37437156927.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_off00006672.bin
8bc2a4e9b24758804b8f49ed932dea90dd8b41757a57be3e2014bad56c031946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 5044 bytes
font_01_sfnt_off0000778f.bin
8a8d0ca8f12a20fc312e2265253278837eca23a1b72c50bfa0aed6751332fd56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778F 10420 bytes

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