Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e2b5b74c6efb1f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-16 23:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d69d8fa0199c6dad756896af971f7d SHA-1: ff69035bba329cb2057d7e0bcb43b0606303f015 SHA-256: e7e2b5b74c6efb1faa7a757a2ad3bba7fac32d19191542fb1d6b00af8322bc03
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links points to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links suggests a tactic to drive traffic or distribute further malicious content. The ML classifier also flagged this PDF with high confidence.

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=quantum-+dot+cellular+automata+design+guideline
    • http://files.workingathomenews.com/uploads/1/3/1/4/131407958/5674186.pdf
    • http://xolewe.rudycaseres.com/uploads/1/3/0/7/130776436/malajomagijorex_tosag_karosanuvoka_revev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/google_play_store_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/netebonab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/41398042778.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/welejulepipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/surah_kahf_quran.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/equidad_de_genero_en_el_deporte.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/gasok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3820/3290/files/2011888095.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c3.bin
039d86befe4c30c15f0d144ca82bef81af74003cad6eafbbb2adc4fd6fa8c6a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C3 5236 bytes
font_01_sfnt_off00006b72.bin
a9ef73d323d0acf6d4c18bf56493aad650150453be9e2f1150c897e6d3cbf0c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 10464 bytes
font_02_sfnt_off00008e76.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E76 4324 bytes

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