Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76517d727bf8fa2…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 00:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713652f3ee80136fe8c1901f6aa084fc SHA-1: c51fee764bc33bc2aa550f32a1df9c12a7577f83 SHA-256: f76517d727bf8fa2d975a3e977e5851f3d33e88df44b9282385cce4203248bf6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=curso+profissional+de+alta+performance'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious destination. No scripts were extracted from this sample.

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=curso+profissional+de+alta+performance
    • http://files.americanawningandsign.com/uploads/1/3/0/9/130969917/fulewaguwun-zijebagig-beraziwu-serekexumufet.pdf
    • http://files.kristinandrewsyoga.com/uploads/1/3/2/6/132695586/3509892.pdf
    • http://gutat.pursuitofyourroute.com/uploads/1/3/0/9/130969242/3610343.pdf
    • https://cdn.shopify.com/s/files/1/0434/3942/3655/files/59726061039.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6285/files/kazep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/admission_form_aiou.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/628911410.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/25913537634.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/yerf_dog_go_kart_parts.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/42762287751.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/lavolibuvegenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/wojijejus.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/house_rooms_english_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/45733822027.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_off00005c3c.bin
651089bcbeb97be1f8dd7288ef95b28b480215db324dd8220949f5dfbce76a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3C 5208 bytes
font_01_sfnt_off00006dd9.bin
2c56c4fff8e4133ae57ad30117d2a42ba34a4a5632f71c1f115d42840e5093cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 12000 bytes

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