Malicious PDF — malware analysis report

Static analysis result for SHA-256 440482b2f277af6f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-02 02:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c085566bd136952f0a8326e444d152a4 SHA-1: 26ca107aa36083e83587ef2758c5ff6b2c4abbae SHA-256: 440482b2f277af6f3d27128e00afd94c86a3bf1d77decf2750b1b84e2b4da3b1
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=pst+to+hawaii+time', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise. The ML classifier also strongly indicated maliciousness.

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=pst+to+hawaii+time
    • http://files.wabashcotobaccofree.net/uploads/1/3/0/8/130814052/3b5ee899b.pdf
    • http://files.uniquearthawaii.com/uploads/1/3/1/4/131437930/razexa.pdf
    • http://files.astepaheadmusicaltheater.com/uploads/1/3/0/7/130775432/20cb91.pdf
    • http://files.1afan.com/uploads/1/3/0/7/130740213/3cd7f147f7.pdf
    • https://cdn.shopify.com/s/files/1/0440/5703/4902/files/3809629055.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/gafanulegona.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/gavigutagudumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/guvoj.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/how_to_show_chunks_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/nuvijoperuvazefopow.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/61007150965.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/73145715360.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/86588496164.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/15627258129.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.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_off0000623b.bin
b09d2515c0b53c3370a98bf48a9e3cdf021306d7fc0f281df278eb47ad8c9dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 4888 bytes
font_01_sfnt_off000072cb.bin
e3b59bc30e5f5c3700fb053acc0287eb69adcd0e5219998acf4727c98bdbdf26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 10076 bytes

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