Malicious PDF — malware analysis report

Static analysis result for SHA-256 432c520ec2d5a00e…

MALICIOUS

PDF

50.7 KB Created: 2020-08-19 00:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06aadad2db0394d806c6714d773e5984 SHA-1: 9c8532dbbadbdcdbecf6f7402d6b2fc5de8c9dd9 SHA-256: 432c520ec2d5a00e4ccc4d8dc4aed4753f1f1d3d3e4acd2b3acff6512ca173e9
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the suspicious URL and several Shopify-hosted PDF links, some of which are confirmed benign but others are unknown.

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.ru/pify?keyword=all+landforms+in+arizona
    • http://files.redcardinalcalling.com/uploads/1/3/1/4/131406841/3892088.pdf
    • http://files.inspiredcreationsin.com/uploads/1/3/1/0/131071037/4357159.pdf
    • http://nizugop.blueridgeracing.net/uploads/1/3/0/8/130814328/topavipofavitunax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/22375239061.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/mabavezinononu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/11th_admission_form_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/3129590491.pdf
    • https://cdn.shopify.com/s/files/1/0434/2523/5111/files/68657159499.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/61903656330.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/21740809684.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/emulator_8086_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/30511140296.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/lightest_reader_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/mapa_turistico_de_cartagena.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/53883830897.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_off00008b12.bin
fa721a1e213726ff5fe5365ac67d7b07d457adb68697b5db4b672faa887bebfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B12 5092 bytes
font_01_sfnt_off00009c4e.bin
1b19d268e6d19bb77fe408c40b0a863d589c0482dab4ab706b907432f876b972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4E 9908 bytes

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