Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe87d3c7ad71f20…

MALICIOUS

PDF

45.8 KB Created: 2020-08-22 06:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9e45794a3128beb58bdaf2a764cc2e SHA-1: 8c03d43fd1c81751811ff1864d74a359709ab6e9 SHA-256: 9fe87d3c7ad71f206c929626be8681545eeffe3634faf6ce79cefaff8b250f88
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=malling+parkrun+run+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to a 'run report', suggesting a lure.

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=malling+parkrun+run+report
    • http://files.jnhospitalityentertainment.com.au/uploads/1/3/0/8/130814205/3346390.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/42712878663.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/19315022430.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3493/files/81990493940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/engineering_economy_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/39258099078.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/10272491692.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/audio_player_app.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/64427232559.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/49084423062.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
stream_004_off0000881f.bin
0b5a23d5943c3b1b621c85cfd2ba2a624320b960108ce1eb09c2f8a65baa3571		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x881F 10220 bytes
font_00_sfnt_off00007770.bin
f42ce2d1609575f5c5c09484c93e07b54bbbce7c94ffc89b714701e11496885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 4880 bytes

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