Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab96c1b563e6007…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 10:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee5ce7691b6fc445cbca0db8e0c5763 SHA-1: 523396cb9bf9ab56a88b122a5befea6f3ffdc10e SHA-256: fab96c1b563e60079719d3cc85ab80c7003a4c8552c69033f941a8761bcaa479
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. Another critical heuristic identified a large PDF link farm, suggesting a potential SEO poisoning or phishing campaign. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily corrupted but contains the same redirector URL.

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=como+criar+lombrices+rojas+californianas+pdf
    • http://files.newhopemyanmar.org/uploads/1/3/0/9/130969477/felaw.pdf
    • https://cdn.shopify.com/s/files/1/0448/0755/3184/files/capillary_electrophoresis_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/11453207185.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/wuvovoraxiwapivigufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/caduceo_medico.pdf
    • https://cdn.shopify.com/s/files/1/0434/2828/2529/files/autotune_free_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/munajunimesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/bubudokugusexosoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/0182/9797/files/lettering_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/6137875469.pdf
    • https://cdn.shopify.com/s/files/1/0440/8265/9493/files/darekepewosona.pdf
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/18862810663.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/connect_four_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/educational_psychology_in_telugu.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_off000063cb.bin
02457ac137f1b9034c531fa912537579d5fb7550c1237581d5744347cd54e4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 5424 bytes
font_01_sfnt_off00007614.bin
03c741db568d6e9bf8871ae9d4ee56092d9e6f5a5b3d73da3b0e35c1fe82f6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7614 11156 bytes

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