Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b18cbf422b34229…

MALICIOUS

PDF

40.5 KB Created: 2020-08-16 22:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b562dd617bc53da73ac69f5c502203 SHA-1: 51f9e54a9caabad2e8c9d10530103287fcc380fc SHA-256: 4b18cbf422b34229b696d33ec7213b9f0705393a784302b57d1ea1e891e053e7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: 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=apa+format+references+journal+articles+online'. Another critical heuristic indicates a PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to manipulate search engine results or distribute further payloads. The ML classifier strongly supports the malicious nature of this PDF.

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=apa+format+references+journal+articles+online
    • http://lulag.stjohnwaseca.org/uploads/1/3/1/4/131452977/f9812788.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/how_to_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/18003148041.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/65297315443.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/movikobufasofiwokafinod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/42347152947.pdf
    • https://cdn.shopify.com/s/files/1/0432/3396/8287/files/opencv_documentation_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/48478742741.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/14231901944.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/xiselorejozetukose.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/google_sketchup_floor_plan_template.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_off000060ef.bin
4b8e142b2dc565ec6a6d9b6a752d3cc6c67df75642db0df37141e0dadfe5b158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EF 5224 bytes
font_01_sfnt_off000072a2.bin
64f844a43617b1ae8cc0525c6bd7c7fe376f836433cde3f2c8e7ce4324d8fbaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 10060 bytes

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