Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0746e32bf280df6…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 01:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028787b6435c6483bfa51a0894553f0f SHA-1: 21bd833b0afdbb7e32528096a8f341c1e7561e25 SHA-256: e0746e32bf280df6c0287f22f084b5b7852c720aaf21ed57dfd174e8e5650a40
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and text suggesting a lure for 'avs video editor windows 7 free'. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=avs+video+editor+windows+7+free
    • http://lipeb.velieconsultingservices.com/uploads/1/3/0/8/130874588/3981317.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/fopenujavumiralob.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/protter_morrey_calculus_analytic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/sodirokakil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/logosizexafaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/tujolova.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/wirixuzemujibafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/biodiesel_production_from_waste_vegetable_oil.pdf
    • https://cdn.shopify.com/s/files/1/0443/6285/8652/files/linear_algebra_equations_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/0224/6814/files/introduction_to_robotics_mechanics_and_control.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/rinubirimiperajozofeza.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7049/files/kamiguxigonaboguvi.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_off0000605d.bin
23180ea3745fbec7c386ca94db3f58dc14465b06720b8f33a0c9b360703efd52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 4880 bytes
font_01_sfnt_off00007122.bin
a8aa0250a8131f836bb9e3616b1b003ed21034618043bb51c464bbf787e4e681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 13204 bytes

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