Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8497490b8f4b3c…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 01:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7bb52037825db3842a477806ba5ad2 SHA-1: 9b126e37095925c652766504b463a0725ad5b0fd SHA-256: 9f8497490b8f4b3c1bfa025bda3b61db8ce7c2a89d3b7b59f035fe3aaff988b4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=wow+engineering+guide+3.+3+5'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other URLs hosted on Shopify, suggesting a lure to download a file. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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=wow+engineering+guide+3.+3+5
    • http://files.spanishhorsebreedersuk.co.uk/uploads/1/3/1/1/131163976/a01281e51a75f.pdf
    • http://dapiwu.fireartsvt.com/uploads/1/3/0/7/130739267/xowidonin-kasuj-woxemiki-ruzate.pdf
    • http://files.democracyalert.ca/uploads/1/3/2/6/132682335/789568.pdf
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131408068/927c5496.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/41900411308.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4392/files/report_my_case_lyrics_by_humblesmith.pdf
    • https://cdn.shopify.com/s/files/1/0464/5791/3512/files/edmentum_answer_key_world_history.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/chhattisgarhi_film_ba_first_year.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/jepasolanejuxeva.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/wukepovuzaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/bacterial_cell_wall.pdf
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/nazepurerovozilusidin.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/bmr_definition.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_off00006174.bin
2e68bd7892a928976a6d710a233e08972912d207fb52d1ad4bd2e5bed0fe27aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 4996 bytes
font_01_sfnt_off000072a9.bin
96ff6ed0098f9ec1921361d6e8ccc545e54ed363919a06060dd994c579729890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A9 9740 bytes

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