Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc630c0e80e0f6eb…

MALICIOUS

PDF

34.6 KB Created: 2020-08-30 02:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e32ae5f9d244a99420de013dc72c19 SHA-1: b344eda702f3e966adf6fbbbf2e52468f1c53fb2 SHA-256: fc630c0e80e0f6eb6af59ab3ca69dfff6454e7cef01f9d4d9767b9e69b4b42e9
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a 'Jiu jitsu university saulo ribeiro' PDF. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, typical of SEO poisoning or link farm abuse. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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/wix?keyword=jiu+jitsu+university+saulo+ribeiro+pdf+download
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/nukovewitabowifavalijon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/94697711376.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/como_aprender_espanhol_sozinho.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/zowisixifegek.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/rumelodisiwuxagalajuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/32829868368.pdf
    • https://cdn.shopify.com/s/files/1/0439/1007/0440/files/ashok_kumar_singh_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/knurling_operation_on_lathe_machine.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/64159847188.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7425/files/pilegex.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/ropanoxufuposufu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/68270733080.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_off000049dc.bin
a534b9ade052d1e200d5be4c7853e8964db5c4e01b59fa649bdef59358b0576a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DC 5496 bytes
font_01_sfnt_off00005ca9.bin
8a00d1b976df2716a35ab5152c8adbc8b3a66a89b316aa06a6c91c7037a5dbf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 9676 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.