Malicious PDF — malware analysis report

Static analysis result for SHA-256 9620c272fe4e3891…

MALICIOUS

PDF

45.1 KB Created: 2020-08-15 05:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b239dea5f54c623a1ed2a6ab255a3a3c SHA-1: 65ac7dbccd0d440dd6379d7a37fe212cfaa0dd74 SHA-256: 9620c272fe4e3891cb574edf5e5b7617ae160ad81b14dc2d093fa5d1f80d6436
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic legitimate documents, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and references a fake training certificate, indicating a social engineering lure. The ML classifier strongly supports the malicious verdict.

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=exemple+attestation+de+formation+ssi
    • http://files.wildgears.com/uploads/1/3/2/7/132710704/088bcbcd396080.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/fimejiposokikonejom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/56300804242.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/38383795830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/5770676008.pdf
    • https://cdn.shopify.com/s/files/1/0428/5091/0364/files/les_accords_renverss_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/mupisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/bukowifedaginu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/cub_cadet_ltx_1040_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4979/files/rawemazopamukazopaxagozeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/kali_rolling_repository.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/85551481407.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_off00006615.bin
a9c32520fa2ecc459004c2486556ee05ce64ae94307e70855214c19dffe89cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 5212 bytes
font_01_sfnt_off000077b9.bin
12df56e585ba2399c51f3a0a71bec6b5e9c487c08284a00290419f1ce53b0b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 15548 bytes

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