Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3406a73f247c85…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 11:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0513217cb8adf04ef4577f69e310195b SHA-1: 77dee6325bb7a4a8000b8af2f9f1395250bdebac SHA-256: ac3406a73f247c8507ee2c00574b8df1a2c8a76cafdb2a5d90e8783dedb17ddd
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL is https://ttraff.ru/pify?keyword=anatomy+and+physiology+of+all+body+systems+pdf, which is flagged as a malicious redirector. The document body itself contains metadata about its creation, but the malicious intent is primarily derived from the embedded 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.ru/pify?keyword=anatomy+and+physiology+of+all+body+systems+pdf
    • http://files.twincerelyyoursfw.com/uploads/1/3/1/4/131438641/dutidivujojotanabad.pdf
    • http://files.melissaritchie.com.au/uploads/1/3/1/4/131454808/modama-zojunavizimo.pdf
    • http://files.totaltuscany.com/uploads/1/3/0/7/130776246/xekuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6939/9452/files/gawidegox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/kewobifigelowadiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4426/6399/files/fuxawulamonagotesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/sizuronitovel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/nuwibimozikazek.pdf
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/tavajufewapudedu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1728/files/8856070561.pdf
    • https://cdn.shopify.com/s/files/1/0448/6601/1298/files/anabaptist_movement.pdf
    • https://cdn.shopify.com/s/files/1/0453/3823/0939/files/free_math_worksheets_for_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/22919604776.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_off00006449.bin
de9b5659e7d8b4aa0c693ad6eb91af1020d372ace0fb36534e982033e6a1a32f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 5588 bytes
font_01_sfnt_off0000772f.bin
2357e46eadf3e7384b32e740d9cf188bad3df3bbe710b6f89707b0ed0cc8204b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 10356 bytes

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