Malicious PDF — malware analysis report

Static analysis result for SHA-256 443b3b0b85b50442…

MALICIOUS

PDF

42.5 KB Created: 2020-08-17 09:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95e31419ae0e25cf918b924fa5c9870 SHA-1: b017c1dbdc68ae4632bb761dbcea9fa69dfef10e SHA-256: 443b3b0b85b50442d98e2f3996779103a5e0f74ce2ed1ce35d0acf5084d68858
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern. No scripts were extracted, limiting the analysis of direct payload delivery or execution.

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.com/pify?keyword=new+odia+dj+bass+song+2018
    • http://files.shamanushibas.com/uploads/1/3/0/8/130873769/bapipemutebilaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8917/files/8323198286.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/jurnal_bullying_verbal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/75089797900.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/analytical_method_development.pdf
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/33125133317.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/atm_card_block_application_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/37675718045.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/xogadeturotaxapunosimu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/73657924739.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/kedoxiwo.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_off00005941.bin
2e5cb74325ff84eef1e099b8a50e337b2adfb5b4397444160c7539ff9efa4572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 5660 bytes
font_01_sfnt_off00006cb8.bin
1ec4162eb4977ff74c21ca2e492e416f67787057a72cb9f8af1f4d0029bf4453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 15260 bytes

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