Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f9cc1ca7b44c2a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 23:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aaaebfc8b3269781314fc7d4d6c1af7 SHA-1: a29dc489915f3df605f0b879ab8ff3ef08325d92 SHA-256: f5f9cc1ca7b44c2a5718f83c558c3254f8bcc2256745888463dc69a9fa0527ff
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, traff.cc, which is likely used to obscure the final malicious destination. The document body contains garbled text but includes the same redirector URL, suggesting it is the primary malicious element. No scripts were extracted from this sample.

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=unicorn+school+abingdon+uniform
    • http://files.campbellfun.com/uploads/1/3/1/3/131378993/edf8607.pdf
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/rotivosuvuwawegi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/92856550624.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6124/files/60545574016.pdf
    • https://cdn.shopify.com/s/files/1/0431/7773/8399/files/ledivovin.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/structure_and_function_of_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0623/files/2004_vw_beetle_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6843/1265/files/zadabekuketafof.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/bevasezuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/laxovof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/xevitedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/latitude_e5400_specs.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/37985931556.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_off00006143.bin
12d112ce16fd0b67a4b00823b4a7fc5a0b6ecf5b48d65dd50bd71f081d02214f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 5564 bytes
font_01_sfnt_off000073eb.bin
c6a573c78d4de8b95a8fc4e796f33e4424d6cc12f448abe374f364b7299edf73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 10468 bytes

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