Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68784717b8e4ebb…

MALICIOUS

PDF

42.2 KB Created: 2020-09-17 12:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0193d5a72cd715bd426a9093fd87e529 SHA-1: 7a6d0d2ed6e3f800fa8247f224d415478aab4107 SHA-256: a68784717b8e4ebb2441e701d79e1ab10e8646c524c39d71268dc3159fa0c33f
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a lure related to a 'solution manual'. The ML classifier also flagged this PDF with high confidence. The embedded URLs suggest a pattern of hosting further malicious content. No scripts were extracted, but the PDF structure and the malicious link indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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=material+science+and+engineering+callister+solution+manual+9th
    • http://files.amprx.net/uploads/1/3/0/7/130738622/7a1b84dcb.pdf
    • http://ruxeteto.beckengineering.com/uploads/1/3/1/8/131872055/560297.pdf
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdf
    • https://digitalcontentmarket.org/wp-content/uploads/2017/11/Solution-Manual-for-Materia
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/baxodufel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/dopeb.pdf
    • https://72644984-be2d-4aa5-b324-6ca6bbac0c84.filesusr.com/ugd/6bb4a2_d8d8980b441b42908a18640c77fd3b11.pdf?index=true
    • https://dc9e219a-536d-4674-91e3-1b74611da7ea.filesusr.com/ugd/f35da0_b7768a70b87e4645888501d1a11ca9a6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/gekesovijotuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0467/9820/9175/files/maximum_normal_stress_theory.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_off00005c45.bin
38ab85d3a7bf747d72c12676e998a477138331917e22d6b6b253bf6409bce2f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 5516 bytes
font_01_sfnt_off00006edc.bin
1c72c96f4bcac2b07c371538b16fa912f8b849bdaa60d36d2dbfed3e7d451907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDC 14160 bytes

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