Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3de941b7e8dc14…

MALICIOUS

PDF

33.7 KB Created: 2020-08-15 05:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b653b2dd3543e48e0a617990b3ec3295 SHA-1: 447209f29c477fb1c9663e65b2ff8bdfe1be06dc SHA-256: bf3de941b7e8dc14a68bf5e4c5eb09bf65cd7ce8024bb2d2711cd8774a1f9ccb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hydrometer+analysis+lab+report', which is flagged as malicious. This suggests the PDF is part of a link farm or SEO poisoning scheme designed to drive traffic to malicious infrastructure.

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/pify?keyword=hydrometer+analysis+lab+report
    • http://files.charaliliana.com/uploads/1/3/1/3/131383318/226648.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/genetics_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7228/0993/files/sony_2._1_sound_bar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/vubizofok.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/sorting_and_searching_algorithms_a_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/administrao_da_produo_e_operaes_moreira_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/siroruragusofinogejovagos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22805348114.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/godagozozifuvap.pdf
    • https://cdn.shopify.com/s/files/1/0438/1658/3325/files/albeniz_granada_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/natexexixamupazili.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/administrao_da_produo_slack_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/fazur.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_off00004710.bin
876f7312240fba9f78e31a700aa32f0d8a91a90c7857f857e9a1e22e6adc727d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4710 5308 bytes
font_01_sfnt_off00005901.bin
2b0682dc0be89fde7d0b4d3e60cd8938d70e313a101ced30a8ebda55bc0ba1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5901 10196 bytes

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