Malicious PDF — malware analysis report

Static analysis result for SHA-256 5678a8437589bcf9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 06:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b91332f61fea125378490bc71f801d SHA-1: b2febfac14b02c4de710d5b2cbca3da3456c0bee SHA-256: 5678a8437589bcf916aaef75369861fe305793596f512842ee73801fcd4d598f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site.

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.com/pify?keyword=graph+paper+1cm+pdf
    • http://files.parsakhorshid.com/uploads/1/3/1/3/131380107/984711.pdf
    • http://files.sarahminettemusic.com/uploads/1/3/0/7/130738870/6f9599.pdf
    • http://files.angelineking.com/uploads/1/3/2/8/132815123/215579c2bc2d.pdf
    • http://files.powerteam96.com/uploads/1/3/0/9/130969966/tilinukarub_mikizetugivo_sevivojaw.pdf
    • http://files.boomerventuresummit.com/uploads/1/3/0/9/130969735/2571348.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/57024101836.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/kipapirabob.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/wofokebujodumas.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/pillars_of_eternity_poradnik_peb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/jepalawojugewojotil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/sketch_license_key_crack_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/debunanaxikuno.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/76927305732.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/wuleraladu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/1230782683.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/curso_para_aprender_a_dibujar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/renudul.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_off00006523.bin
d03d150780ad90dfb4bad5d9b5c37a5284f7e7f25725a31ae18e4b9fbe41cb75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 5268 bytes
font_01_sfnt_off000076ef.bin
95cc039b7167adbee183d263934d3a75a452eb27d246b7dd48b4677ff02c88f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 10068 bytes

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