Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1720e0723728e8…

MALICIOUS

PDF

35.2 KB Created: 2020-08-07 06:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cd2331bf71eb48d77b0816f8508b95e SHA-1: f4556c38202b69acc89a5c957b08bf072bebc97d SHA-256: cd1720e0723728e861c9649ba5095e1287ddd205b9788967ab13799c98ec1495
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=analytic+geometry+pdf+ebook'. The document body, though heavily obfuscated, contains this URL and appears to be a lure for an 'analytic geometry pdf ebook'. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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=analytic+geometry+pdf+ebook
    • http://files.classicsteachers.com/uploads/1/3/1/4/131409333/9160481.pdf
    • http://files.amaxdesigns.com/uploads/1/3/2/8/132815054/wipepiwapazalul.pdf
    • http://files.avistonlegion.com/uploads/1/3/2/8/132814097/412833.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/64822452902.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/medisedisatuvuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/35495655181.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/lowes_brooksville_fl.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/75543148718.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/60603322458.pdf
    • https://cdn.shopify.com/s/files/1/0438/2477/5330/files/zonivadodakupuzumonaxefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3541/9039/files/wemejikikisewop.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/xibekalefuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/60802278149.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/viduvutaxaton.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/causes_of_tsunami.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_off00004a9a.bin
04e8cbe293595e11bafea4db1046862cdc82cc699d33e9e8f13982adfbac230e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9A 5592 bytes
font_01_sfnt_off00005d98.bin
b2da3dc12b6f2651e9feeccf090724f6a2dd88bf55c0d684cf699e11774418db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D98 10072 bytes

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