Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39f3bb3da26b517…

MALICIOUS

PDF

46.7 KB Created: 2020-08-19 20:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f99bad9778ecfea61c1e834d510de9 SHA-1: 8f3e158ddefca37dabe8dc452f1e850db2a1051b SHA-256: c39f3bb3da26b51747da5196460139ae55f78c4fd4b6c7a73bb9de662e71af8b
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL, https://ttraff.com/pify?keyword=cloudstack+4.+8+installation+guide, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the installation guide and the redirector URL, reinforcing the lure. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final 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.com/pify?keyword=cloudstack+4.+8+installation+guide
    • http://files.whatisib.com/uploads/1/3/1/3/131380128/nijosogupuxawufozep.pdf
    • http://tujawad.progressivebrick.com/uploads/1/3/2/6/132681946/zukojumi_tosujomupatozu_totip.pdf
    • http://files.smashsomethingtulsa.com/uploads/1/3/1/3/131382274/zelanopeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/xisopukizexedas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/56069365823.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/rectification_of_errors.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/64840023994.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/73631110867.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/selokalolezemoxinej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/pumuzezifororowepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/44888202338.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0439/1187/2667/files/kidubudefatewos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4583/files/google_sheets_api_v4_example.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_off0000765f.bin
bcfe548e41c8d39611f65e5605227f8a06720187fab765a0a21610e65db9ca0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765F 5292 bytes
font_01_sfnt_off0000887a.bin
afcdc72f4c4e1061c46cdf85c6365782befbacda023f0417cd6798083677d621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 11064 bytes

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