Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f4510834f18e02…

MALICIOUS

PDF

42.2 KB Created: 2020-08-15 17:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49c41f9dbf5d5a75252adf8830e764f SHA-1: ce7241bd78e12c717e7d17be16598df187afc89c SHA-256: c3f4510834f18e02ce727889995c36df136ca13f7c0de992a2a108fb5f81c454
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a document related to firearms safety. The document body and embedded link structure suggest a lure to a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for 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.cc/wb?keyword=canadian%20firearms%20safety%20course%20student%20handbook%20pdf
    • http://somarifit.mojohomeautomation.com/uploads/1/3/0/8/130814311/4622906.pdf
    • http://nelerunez.artappraisalfirm.com/uploads/1/3/0/8/130814526/9134269.pdf
    • http://files.ehheerunner.com/uploads/1/3/0/7/130739776/xujuxal.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/sewowixozalopimixudido.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/pezuzaxiwatolekun.pdf
    • https://cdn.shopify.com/s/files/1/0451/6134/9269/files/ielts_speaking_task_2_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/npm_run_watch.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/official_sat_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/samsung_company_overview.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/luzelelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/nomerarenoronafezulanapip.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_off00006493.bin
39315964c990c438b9bbe170be579311a7213826d6743c353d1fb069ab1e560d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 5572 bytes
font_01_sfnt_off00007758.bin
0e06cbfca11db0b30d6c1a48b27cc7e8ee903aedbd6981aec697aa7e8fda7963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10800 bytes

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