Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ab30b03948414a…

MALICIOUS

PDF

54.5 KB Created: 2020-08-15 00:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40cd25e76c891f623f30232688a9feb3 SHA-1: f68bd02514a17593d272c5769453a4d6f78dc501 SHA-256: e0ab30b03948414afb86c5379b55cf1ad1e61cb4dc47bfc0a79cfd20c387396b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector: https://ttraff.cc/pify?keyword=bilinear+forms+linear+algebra+pdf. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a link farm heuristic further supports the malicious intent, aiming to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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=bilinear+forms+linear+algebra+pdf
    • http://files.hconceptshop.com/uploads/1/3/0/8/130874204/rigibegomalovof.pdf
    • http://files.spotteddairyair.net/uploads/1/3/1/0/131071137/6c75aa1a.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/78276291076.pdf
    • https://cdn.shopify.com/s/files/1/0428/2194/3463/files/oxford_discover_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/metodo_ontologico.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/hot_virtual_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/vamalinobul.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/deroxewilaberele.pdf
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/areca_leaf_plates_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/27597200183.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/automotive_car_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/xanejivogiwowezamekipixij.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_off00007398.bin
27838cff51ac79686213591585beb6a822ae40769379b1388f3f336e52c48165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7398 5552 bytes
font_01_sfnt_off00008656.bin
948833a2f34969ff1683473d7c6a13f21f76764810b1ad9be731161bd9f40f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 14456 bytes
font_02_sfnt_off0000b41b.bin
bd3b13a6f27acafadf7e978af8b7d77a28a066458c74dd1319d995e0000a43f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 17024 bytes

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