Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e5ae70592e4f09…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 22:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e19bc96f48318147e16229fd1f2234 SHA-1: 65c3ffa8a8878af847647dd47ee4738629bacfb2 SHA-256: 39e5ae70592e4f099a63172b6f7964a6f5053b9aedbb91229cae8caf145e7525
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, directing users to a malicious URL under the guise of a document download.

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=auditoria+de+gestion+definicion+pdf
    • http://files.mod-el.org/uploads/1/3/2/6/132683252/tetaguxunajapit.pdf
    • http://files.lilylunaa.com/uploads/1/3/1/3/131379894/3974053.pdf
    • http://files.sharonlauricella.com/uploads/1/3/1/6/131606111/fiwolugamoluge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0124/files/62169524098.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/bazefanitir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/77766091027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/ridosetaravukapekevor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/84956190237.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/reality_therapy_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/wemopedis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/33363060229.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/puxubujox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/50792535129.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/pumuzafedofosefunoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/mario_kart_ds_rom_download.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_off0000624d.bin
d8c6bbcbf995212cf5f0cf52475c51c5c95ec9612e39f0b79408c8f79951534c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 5280 bytes
font_01_sfnt_off00007455.bin
b488150560b53cc0bf82608cc6e822e6e310d4d3a5d34fcc5667fe9686b1b8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7455 10228 bytes

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