Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd02cabb9e638eec…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 18:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995286a7fbf58a236821b9cdf56c456c SHA-1: 204a5fc2d5f2cf05016d38b8040342772a4ff45a SHA-256: cd02cabb9e638eec728c47a7776a1b80b45b240c928986e2be6732ea838672de
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=auditoria+financiera+pdf+libros', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in directing users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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=auditoria+financiera+pdf+libros
    • http://vejigi.signalsecret.space/uploads/1/3/1/4/131437119/tulogeponasenap-wijiresamo-vigekozaga-raronifuko.pdf
    • http://files.alissabethphoto.com/uploads/1/3/1/6/131636890/buwajatewiw.pdf
    • http://files.kahua-ranch.com/uploads/1/3/2/7/132740204/lakipixegufew-xilexaratuzow-wiwubegapijuj-wugukebugemoj.pdf
    • http://files.azmomsco.com/uploads/1/3/1/4/131409463/57f44.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/47241520216.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/52264427180.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/xetisuvezax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/analysing_qualitative_data_gibbs.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/72923690155.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0888/files/dnd_5e_character_sheet_editable.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jibivugutujul.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/dd_form_368.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/70060222936.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/wenetoduputexenadokizexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/nitakuwamexotanupumetuxos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/matching_supply_with_demand_cachon.pdf
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/microcontroller_based_data_acquisition_system.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_off00006c17.bin
dda065ff29ef16e8ca552bfc5c137f2a913fd664dd489ffaeeb3e52a797516a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5276 bytes
font_01_sfnt_off00007e07.bin
cc7bfb416bbcd9a70f6dc8ea1cb5d1036d046bd67f7fc54135e862c0ff25defa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 11568 bytes