Malicious PDF — malware analysis report

Static analysis result for SHA-256 497c16e939ef5e83…

MALICIOUS

PDF

45.4 KB Created: 2020-09-18 04:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e5346f8420156729c531acd3dd84a6 SHA-1: 2fb88c3413d41d5aa3d1b368cca5771dae8a6e39 SHA-256: 497c16e939ef5e83db2e36d03878beec4f0fef1040ec68f9da97cc2c0f394979
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.club/wix?keyword=lifecam+vx-3000+mac'. Another critical heuristic detected a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malware. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is driven by the embedded links.

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.club/wix?keyword=lifecam+vx-3000+mac
    • http://lavul.enriqueseira.com/uploads/1/3/2/6/132682051/vovinulemeten.pdf
    • http://zamenal.yconnyi.org/uploads/1/3/1/6/131606255/2260012.pdf
    • http://sagaseneg.dorothyhoeft.com/uploads/1/3/2/7/132740405/murejog.pdf
    • http://madaxulof.fundacionchelaquintana.com/uploads/1/3/1/4/131407995/8583241.pdf
    • http://files.nhswomenslacrosse.com/uploads/1/3/1/4/131438418/9473772.pdf
    • http://files.embroideryequipment.com.au/uploads/1/3/0/7/130739165/bamojoxofokino-turuxuku-ribifezasakiki.pdf
    • http://bupologu.stretchwithchuen.org/uploads/1/3/1/3/131380429/3404710.pdf
    • http://dituraku.coconutgrovemassage.com/uploads/1/3/0/7/130776760/319544c75b.pdf
    • https://c10464c1-3228-4243-8fba-3048f87fdffb.filesusr.com/ugd/007d40_02ef5a77877a4f2ba5cdc8c89fdee713.pdf?index=true
    • https://28aaa9f4-55aa-40e7-83c1-00f75a7ef137.filesusr.com/ugd/278743_e2a61382e7ec468c8b105c1190857fd4.pdf?index=true
    • https://dc1c645b-b503-4c07-b733-fbefce336ce8.filesusr.com/ugd/f2c1dc_392cb150a5434348b02fbccce90e847c.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d9d.bin
c85aefb1d87355b28e2821ec3f6f96a1f532ec50fbe84e6b75ced9d09fd8676b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9D 5128 bytes
font_01_sfnt_off00006f1d.bin
2ff1df7540f18b7a71fbc87b3496b856f1e61d9ae34768b334880f1b222d9d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 10668 bytes
font_02_sfnt_off000093c6.bin
9e72eb71cec9de0c778457f6415ace9b059829408473d8201bd10fc7b1fb75ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 16284 bytes

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