Malicious PDF — malware analysis report

Static analysis result for SHA-256 98482491441bf3c3…

MALICIOUS

PDF

40.1 KB Created: 2020-08-21 10:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6694421084c382111cd77fa7b9b9ce99 SHA-1: 4bed1da569768920308b67d224bd3b7b784dcc7b SHA-256: 98482491441bf3c364624994150fda32566f36dbcfeedb5855cdb2a1b63d0404
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=constipation+teaching+sheet', suggesting a lure related to medical information to entice clicks. The primary attack pattern involves redirecting users to potentially malicious content.

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=constipation+teaching+sheet
    • http://files.auntiejaniceentertainment.com/uploads/1/3/2/7/132740892/nesesuzo.pdf
    • http://jabofi.ballersabroad.com/uploads/1/3/1/4/131452890/vatetosagudod.pdf
    • http://files.mrsdallas.com/uploads/1/3/1/4/131453432/pofupatawupazel_botimu_fusoxigi.pdf
    • http://files.meiraacademy.org/uploads/1/3/0/8/130873708/0972dfa9c44.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/gedobesabijebixelumun.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/75666490898.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/87981086756.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/tezereg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/jexokeroj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/brown_organic_chemistry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/38974068733.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/rental_property_tax_calculator_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/95780435773.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/solving_compound_and_absolute_value_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/sizikidogazodiwulamosani.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/77391176054.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_off000061e9.bin
8166d58435e7749e8b26a3b9c73401e2d663a1e0161033c8b9149ae0c657c5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 4972 bytes
font_01_sfnt_off000072cd.bin
eb4fd28048b09f77a4fa3222d18bc143a758f3578cabd1526848ab6bf49be9ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 9696 bytes

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