Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1518942da034688…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 13:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3e246c0e403c4bcf6f9083ba6f4251 SHA-1: f963f5af27f12e8d5d16854ad03ba96517f14b16 SHA-256: e1518942da034688be904b096d05ac6ce1294ad66c460db4c4230502a171f3b5
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.com/pify?keyword=compare+numbers+worksheets+1st+grade, which likely serves as a redirector to further malicious content.

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/pify?keyword=compare+numbers+worksheets+1st+grade
    • http://files.azzarodogs.com/uploads/1/3/2/7/132740291/jukukixa.pdf
    • http://files.johnnytalbot.com/uploads/1/3/1/4/131436956/1213291.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/joxiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/zigorilerugotitijibeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/banonuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/97853028413.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/attachment_styles_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/36452623898.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/85485654352.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/negunawadaruxevefebar.pdf
    • https://cdn.shopify.com/s/files/1/0447/8582/7991/files/functional_foods_and_nutraceuticals_in_cancer_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/nopazinug.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/free_harley_davidson_wiring_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0431/2445/7633/files/14356858819.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/
    • https://cdn.shopify.com/s/files/1/0447/8582/7991/files/functional_foods_and_nutraceuticals

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b6d.bin
2c0ada001437210dea520d25d73043b97a79e6d128dae0ce6fbdcb6a1d644594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 5592 bytes
font_01_sfnt_off00007e4f.bin
262475945671a6e569923a13811c706c60526c6b0929cb074799dd00763761a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4F 10084 bytes

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