Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cea47a83d1f5422…

MALICIOUS

PDF

33.6 KB Created: 2020-08-18 15:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af2de9f664a62f0f09f581211299b098 SHA-1: 3da508641144831870b4786e5eee987fd7ae440a SHA-256: 2cea47a83d1f5422b22f9dd38f3900f3c791a5fb337707355a3a47e1737496b3
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which are part of a link farm, likely for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites.

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.ru/pify?keyword=ss+brewtech+ftss2+manual
    • http://files.orangecountyconsulting.com/uploads/1/3/2/6/132681832/fazejademasu.pdf
    • http://files.hillprints.com/uploads/1/3/1/4/131438532/7383181.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/top_sites_to_movies_bollywood.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/wevemedove.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/download_adobe_reader_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/dictionary_of_accounting_terms_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/analise_sintatica_completa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/varogovafadigapopofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/jisigolijiximak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/96559014453.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/74381694480.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/6268302418.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/pegema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.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_off000045cd.bin
f1e9b83c5a85369f4eb61b4437653c90acaced0c6bfa1959ca23ead0c66061fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45CD 5588 bytes
font_01_sfnt_off000058b4.bin
adb0417f3f67ec28aa738827d6297caa482dda266ba21abffd2bc12c21010a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B4 9644 bytes

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