Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5e5757501a8978…

MALICIOUS

PDF

46.1 KB Created: 2020-08-29 07:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aba70bb1dd3e5b8ef8e154c2a8ffd9fe SHA-1: 7d92c66d6065354f375b0768c43620e0f874a8b1 SHA-256: 8e5e5757501a89785cf53d80d0819243bc8e879419776e4efe52c78ab73299ba
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=a+horseman+in+the+sky+analysis+essay', indicating the primary lure is to this malicious site.

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.com/wix?keyword=a+horseman+in+the+sky+analysis+essay
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/augmented_reality_london_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/boeing_737_900_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0434/9761/9621/files/centrifugal_compressor_design_and_performance_david_japikse.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/riwedavidemokoxegava.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/gewane.pdf
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/11615638324.pdf
    • https://cdn.shopify.com/s/files/1/0432/0546/0125/files/online_library_management_system_project_report_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/bar_del_infierno_alejandro_dolina.pdf
    • https://static.usrfiles.com/ugd/b8c837_516c69d967e2461f9c8215a2cc41d15a.pdf
    • https://static.usrfiles.com/ugd/b8c837_36d85b39c41c49b784ad540c406963a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://static.usrfiles.com/ugd/b8c837_b321b21320a64d7cbcbbbf065576e80b.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_off00007567.bin
e159bb158ac673cb676035e9841e90f0668c8d385508f1c74156c9d3de265e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7567 5080 bytes
font_01_sfnt_off0000868c.bin
3a585b32d3535e52c968ede4e2c7cafbb4a5d4a6c92624c510da66661f2f46fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 11388 bytes

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