Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2dde1c26a8ab65…

MALICIOUS

PDF

50.8 KB Created: 2020-07-30 11:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b520f902f931e2bff1ec52a7e68044a7 SHA-1: f5d8348f33bd2cda5dd256d25e8acc4b7305e82f SHA-256: de2dde1c26a8ab65491e56e524dc9b464c555247604fa3e7ccfeff818c361daf
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, suggests a lure related to creating a CV in PDF format, likely to entice users to click the malicious link. The presence of multiple external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful 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.ru/pify?keyword=cara+membuat+cv+format+pdf
    • http://files.faithforinternationalassistance.org/uploads/1/3/1/3/131398134/d536a9.pdf
    • http://files.graingercountytomatofestival.com/uploads/1/3/1/4/131452950/lapajevufowo-mataf.pdf
    • http://files.2cvtv.co.uk/uploads/1/3/0/7/130739368/3951102.pdf
    • http://files.arcubusensemble.com/uploads/1/3/1/3/131382841/6497604.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/45052188682.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/ragat.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/52233776594.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/540019148.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/xewijokizinedalumanaviwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/64130503102.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/55406321501.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/89670780557.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/66411007371.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/jasox.pdf
    • https://cdn.shopify.com/s/files/1/0440/1171/6766/files/lejonajorigaziwojuzubef.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_off000088f8.bin
ec9ebb8d0baee35da21a0d4ffc269e0f61d69fc4bd88f34999526d959cc58cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F8 5044 bytes
font_01_sfnt_off00009a25.bin
9e064dc77d82c2506aced6535f785a76815c63b1093a3a9b9eb6d67eac2666ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A25 10628 bytes

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