Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bcaf4fdc5f40b4…

MALICIOUS

PDF

116.9 KB Created: 2020-08-12 04:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33216237fa95100821e04a1607ece9e SHA-1: 495a3812837c94aae5e943991eb42791fa0c8817 SHA-256: f6bcaf4fdc5f40b4140ed93f0beaa7566b811aa4561cb571cd7b8256b35adc3d
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 'https://ttraff.cc/pify?keyword=ideology+of+bjp+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ideology+of+bjp+pdf
    • http://files.churchofthemightysavior.org/uploads/1/3/0/7/130740211/zegudok.pdf
    • http://zikanil.puertoricanparade.org/uploads/1/3/1/4/131453780/9893e.pdf
    • http://files.getconnectededu.com/uploads/1/3/0/7/130776728/ea4745902e411.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/26635529188.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/zetabukejofowokule.pdf
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/54525150459.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/water_wastewater_and_stormwater_infrastructure_management.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/61234151954.pdf
    • https://cdn.shopify.com/s/files/1/0433/8932/1366/files/kakeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/38475403.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/97430432560.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014fba.bin
38ecaaf376da2f2966aec73e459176c337fa86ee6cea748fdb5ce49cea974857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBA 4532 bytes
font_01_sfnt_off00015f39.bin
37dfb7130a5016e3daa424b98b7724fcc98853d15201903d52784a66587994fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F39 15468 bytes
font_02_sfnt_off00018fc4.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FC4 16164 bytes
font_03_sfnt_off0001a4d9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4D9 4324 bytes
font_04_sfnt_off0001b2da.bin
ab35fcb2f88a5879a2e6d7ef4eab4a0bda187ec75845e042faf746bee3f96c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2DA 4956 bytes

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