Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8661cb79421816…

MALICIOUS

PDF

38.4 KB Created: 2020-08-27 13:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9f1caeea43a003e0ea8c7643ca1543 SHA-1: ef887228955d057503c668838f58f8df26aa580b SHA-256: 3e8661cb79421816c4610396500d7334d1a705f4d0b9425e3ff091dd672060d7
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, contains the same text as the redirector's keyword parameter, suggesting a lure related to children's clothing. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content. No scripts were extracted, but the primary malicious action appears to be redirection via the embedded URL.

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=pantimedias+para+ni%25C3%25B1os
    • http://files.c3edu.org/uploads/1/3/1/3/131398423/jisasisimudisu-womanafol-jusuvonaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/57553256061.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/susav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/94613308227.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6552/files/jefegenosisufetoximo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/programmatically_annotate.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/59045463545.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/fizefikerinizobuxazen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/us_history_textbook_11th_grade_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/health_psychology_9th_edition_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/26324403274.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/honda_element_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/bujokobiruw.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_off000054c1.bin
8e22290a4e82f91bc1a05ee08415d679c86db3ad83e2533ada7a47a424749b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C1 5284 bytes
font_01_sfnt_off00006658.bin
bbf19950c9bcd8ffa37eada1f742d2b81758dcc99734314ead5d1c3458292cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6658 11196 bytes

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