Malicious PDF — malware analysis report

Static analysis result for SHA-256 93166d56091cf539…

MALICIOUS

PDF

41.8 KB Created: 2020-08-13 11:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e00d708269afda854dbaf090b78819 SHA-1: f86477b3704ddbbffe5f5e17a860c0aa89299845 SHA-256: 93166d56091cf539010e0d204e3fc07a438d8b4b39ef0a7d151e1cef5ed6423f
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, directing users to 'ttraff.cc'. The document body, though partially corrupted, contains text related to PDF to JPG conversion and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for the malicious redirector. No scripts were extracted from this sample.

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.cc/wb?keyword=how%20to%20convert%20pdf%20to%20jpg%20on%20pc
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://files.rmahelena.com/uploads/1/3/0/8/130874192/7f06b.pdf
    • http://jejuwuwas.osatelegraph.org/uploads/1/3/1/3/131383790/fibatofomu-viloko-dinexogazab-kejip.pdf
    • http://files.divinedesigning.org/uploads/1/3/1/0/131070846/zopudezesujezowobos.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/nilefisuvawixaruxezozos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6166/files/metric_bolt_dimensions_chart.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/45852352401.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/ratekitoguzebipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/jefujotim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/kikozajeravuluv.pdf
    • https://cdn.shopify.com/s/files/1/0443/9130/1286/files/bsc_math_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/dadekisopoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/5543/1323/files/attendance_management_system_project_in_java_with_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/73448593063.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/loop_expressions_after_effects.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_off00006632.bin
daa5d5c9c8124fe79ab20b8da90f958b4518d68f359cc5ea74010f955c6c8bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6632 5092 bytes
font_01_sfnt_off000077b1.bin
0144a11d24c29954ac00a32f45ef65f0f2fabb6bd93334dd0bef9eacb7998b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B1 10084 bytes

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