Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9497d2c51cb3a5…

MALICIOUS

PDF

65.3 KB Created: 2020-08-17 02:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9738e1020c0254b48986bf56b2282133 SHA-1: ad69d81894c124bef0e99d5949afb6680d37c392 SHA-256: aa9497d2c51cb3a5b1f4bad62f34fa3a3570feda45d6d6a8777f14f01dac6ea1
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 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and references 'Don Juan Tenorio', likely a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=don+juan+tenorio+pdf+cervantes+virtual
    • http://files.northcrawfordplayhouse.com/uploads/1/3/1/4/131452861/rozuwonapegazono.pdf
    • http://files.eleanorknott.com/uploads/1/3/0/9/130969751/8181712.pdf
    • http://nuxefun.typea-wesome.com/uploads/1/3/2/7/132710712/a53137d3ed.pdf
    • http://files.meadowlodgebiblecamp.org/uploads/1/3/1/1/131163736/bifejaxalomubur_toxozizagug.pdf
    • http://files.frauhoeckner.com/uploads/1/3/1/3/131379111/xejiresagisi-kivakubikud-tutuxazux-dufimegesobijut.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/56000995072.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/nelurisuwixetifokinevek.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/tafejukibovurezorapod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/51634248875.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/android_auto_stereo_nz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/dajenuwedudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/58058377749.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/area_and_perimeter_of_square_and_rectangle_formula.pdf
    • https://cdn.shopify.com/s/files/1/0440/6919/1832/files/mepesebubixawewuwivameg.pdf
    • https://cdn.shopify.com/s/files/1/0430/5721/7693/files/perufise.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4843/files/trigonometry_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6517/1354/files/23550059158.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_off0000c3b6.bin
ae2f61914ad06d1ffcef6c7df39c190f0982f61f3986677994d0f898b8bc95c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B6 5284 bytes
font_01_sfnt_off0000d5d1.bin
d48d9db7736821fed650f16c2588db2e8b2e6ba273abbc1fbc9c91b6fa4ed57c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 10088 bytes