Malicious PDF — malware analysis report

Static analysis result for SHA-256 2394de592b3478d3…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 06:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e04f93ba662df6a52d9fa41da674fa SHA-1: 3fc2dfc3b42a9d6b734ce420f26236c9e7f48763 SHA-256: 2394de592b3478d33ff7a3c2820da602edca6d3e361192a103a023c47d799479
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=fssai+logo+guidelines'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to benign Shopify domains but including the primary malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a plausible lure text. The ML classifier strongly flagged this PDF as malicious.

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=fssai+logo+guidelines
    • http://files.the-trilinq-sg.com/uploads/1/3/1/6/131607522/pisedofodef_sosodananimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/alternative_asset_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/77012445392.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/dafaxopobexeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/6902/1089/files/kodovixudazuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/25794631945.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/sivemuvazogodemalap.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5650/files/hypothyroid_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/food_handlers_license_nyc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/59446411849.pdf
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/61081036462.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/
    • https://cdn.shopify.com/s/files/1/0432

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc2.bin
2626f4dc337847546a4e8ebc2123f460ec3d93cc6cef8ae3b14464e1554ee565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 4852 bytes
font_01_sfnt_off00007052.bin
553a0c38edfcaec99beab3bd1da000e49344dd4029c79fc1e4c809945d7127d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 10128 bytes

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