Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2665f10c6fab565…

MALICIOUS

PDF

38.6 KB Created: 2020-08-25 17:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1da3283dace805fb9b00c75bcf48482 SHA-1: 5311605b43718ed30faae02b15e71555b52aa14f SHA-256: b2665f10c6fab565541aef8097b5c20117a320b114fd705b7e7603ca08fe1cec
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, specifically pointing to 'https://ttraff.cc/pify?keyword=casper+movie++free'. This indicates an attempt to lure users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is designed to host numerous external links, likely for SEO poisoning or to distribute further malicious content. The ML classifier also 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.cc/pify?keyword=casper+movie++free
    • http://keweduv.lindenhillspottery.com/uploads/1/3/1/4/131437462/8045141.pdf
    • http://files.mfldiobr.org/uploads/1/3/0/9/130969057/dimesowen.pdf
    • http://gomise.tessasanosnutrition.com/uploads/1/3/0/8/130814297/9b5be42d439dd9.pdf
    • http://dukuz.shopatlantaskinspot.com/uploads/1/3/1/4/131437508/1608943.pdf
    • http://files.newfoundlandclubofnsw.com/uploads/1/3/1/4/131438312/negulane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0454/2785/1422/files/medea_euripides_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/houston_astros_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/68327073784.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/ge_atualidades_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/6037899180.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/apriori_algorithm_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/excipientes_farmaceuticos.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5830/files/best_tablet_for_reading_colors.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_off00004b20.bin
cc9e20f8948dd45f056f5cb2ee3eb051d6b19107a2e16a2f76472620ce674fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B20 4700 bytes
font_01_sfnt_off00005b1e.bin
aac5a45f05a54b16ad535a54b5b32afa76c8432d1b43da670b43f50c69a52a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 10760 bytes
font_02_sfnt_off00007fde.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 4324 bytes

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