Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff093d5b932c798…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 15:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b4f7ea6b6d2e37193e4668a6c5c5f6 SHA-1: 9d8e0b633549b1eeb2f288070d55281eeff4676d SHA-256: 1ff093d5b932c798af070ea25c3494a363762f1ff2517749ae8b0d41e2cbee66
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a worksheet answer key. The ML classifier strongly indicates maliciousness. The primary malicious URL, 'https://ttraff.cc/pify?keyword=states+of+matter+review+worksheet+answers', is designed to redirect users to potentially harmful content. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the true malicious destination.

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=states+of+matter+review+worksheet+answers
    • http://files.liveruralaustralia.com/uploads/1/3/1/3/131398526/5a00ac01c3956.pdf
    • http://ribabuzal.invisageblinds.com/uploads/1/3/1/3/131398097/6241761.pdf
    • http://files.allnaturalservices.com/uploads/1/3/1/0/131070485/3626162.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/rupapiwafosigi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6357/2635/files/expanded_metal_lath_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/jopok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/22645969453.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/22229792161.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/lajojakunarigiwe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/23801298813.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/15483520769.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/aristoteles_y_dante_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/kufigitatanitadobimiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/muzetanutipexezaxiw.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_off000068bd.bin
e0b060aca51228e724e5a67973a0584ac5c4470d45677eed561a9205490cbc91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 5292 bytes
font_01_sfnt_off00007aa7.bin
6f9b8ba3502fbfcaabb8bfd991e83f91d4feaa5b8bf1182d3c3bfdf89031bd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA7 10204 bytes

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