Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b84a3d5091a9af…

MALICIOUS

PDF

38.5 KB Created: 2020-08-28 01:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adaebb011115703b5248ff9b4bdf2efc SHA-1: 79b731081a8542abd0792a8ec13ee151a213a071 SHA-256: c1b84a3d5091a9affd677182bff7319877d43bc61a9258e1c2fdfa7653643519
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is a common lure for phishing. The document body, though corrupted, contains text related to 'plant based recipes pdf' and includes the malicious URL. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to obscure the malicious redirector by embedding it within a seemingly legitimate link farm. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious 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.cc/pify?keyword=plant+based+recipes+pdf
    • http://jarozujev.mrcarnahan.com/uploads/1/3/1/4/131407406/3656479.pdf
    • http://jomona.austinburgfirstucc.org/uploads/1/3/1/3/131381428/7834107.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/77373587786.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/cladistics_lab_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/89773856453.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/2083018641.pdf
    • https://cdn.shopify.com/s/files/1/0448/6260/3426/files/understanding_culture_society_and_politics_grade_11_module.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/31245124570.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/rufigojapozefirarubeweba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/4193922142.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_off000058fc.bin
bda052fd52a4504261d33dcc5cd1487765550484cee39c1b543bf9e421dc4627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC 5288 bytes
font_01_sfnt_off00006af3.bin
f1f581f54739d54127fb90d737852f74143cd3b0118a08ee34e4c86ac8bd8365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF3 10180 bytes

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