Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8b5bdd13b73964…

MALICIOUS

PDF

47.6 KB Created: 2020-08-23 15:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbe7d8890714c602ecb2fb33da6c78d SHA-1: 202656fa7dc704d1854de2499075353c37cebf93 SHA-256: be8b5bdd13b739640dc95046a0ac1e552fa1eff85e59651990759dc16af7a55e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a mass external PDF link farm. The embedded URL `https://ttraff.cc/pify?keyword=search+form+font+awesome` is a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, suggesting a large-scale distribution effort. The primary goal appears to be redirecting users to malicious content.

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=search+form+font+awesome
    • http://jogowipa.onethreefour.org/uploads/1/3/1/3/131398455/ff0f74031ac6a9.pdf
    • http://files.happiediapers.com/uploads/1/3/1/4/131406449/b48b5ddd80.pdf
    • https://cdn.shopify.com/s/files/1/0436/4930/2693/files/25079900029.pdf
    • https://cdn.shopify.com/s/files/1/0439/1786/9211/files/gobekixubedexafemutu.pdf
    • https://cdn.shopify.com/s/files/1/0462/8126/1205/files/62997890950.pdf
    • https://cdn.shopify.com/s/files/1/0447/0479/2729/files/performance_appraisal_spreadsheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/nizisefaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/latex_beamer_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/37340580487.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/two_fundamental_characteristics_of_financial_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/67540129032.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/38702576817.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000614a.bin
b83edc6fff6d6e0b08c38cbfd385efdd1980f17b0edf62ca0e3dd3166f452d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 5284 bytes
font_01_sfnt_off00007321.bin
c85a09fba3b739ad96332e572d29c2f031b93eafb0cf223fa946760abb00c531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 6772 bytes
font_02_sfnt_off000085b6.bin
3b3149ba275e74f5278783a425c87f6491b68dfd29f8c9738957ff9b7d447dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B6 13452 bytes

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