Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc52af1c3f9293bd…

MALICIOUS

PDF

49.3 KB Created: 2020-08-04 07:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038bcf5f52ed590050abca41f853baf3 SHA-1: fc9ff00b748cd9ce7e915428404ecb4046be5d37 SHA-256: fc52af1c3f9293bd23c80c5bf2da9bff5e69514d5d84e92f6b5a45eb0f393187
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments related to 'acid rain chemistry project pdf' and the malicious URL. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further malware download or phishing. No scripts were extracted from this sample.

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=acid+rain+chemistry+project+pdf
    • http://files.coralgardenonline.com/uploads/1/3/1/4/131406092/duxefebi-duvalagukesesa-xutugelixo.pdf
    • http://files.mygwbc.org/uploads/1/3/0/9/130969708/73fb2.pdf
    • http://files.siochantafarm.com/uploads/1/3/1/4/131453896/karatuni_vepusemuv_wikamipivaxum_sudesa.pdf
    • http://files.palettefoodservice.com/uploads/1/3/1/4/131437982/mosigowole.pdf
    • http://jexiwa.konajoanna.com/uploads/1/3/1/4/131453674/6339169.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/bosositer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/nexus_fl_studio.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/24486075282.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/76506619359.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/25364717030.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/jepiwizafowemeserub.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/30837385931.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/honda_cr80_service_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/53963208717.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/18748946827.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/javascript_extend_array.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/77870969089.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_off00007522.bin
ebbba44c40a2b073df23b561a84b04ea5e6a0efe3d690ab10b8c4ef036ff7b66
pdf-font-stream PDF embedded font (sfnt) at offset 0x7522 5316 bytes
font_01_sfnt_off00008703.bin
9a60b8f92b1a51eb5a1b290c394d89811119b2f01fdcf1886d70782f18c09743
pdf-font-stream PDF embedded font (sfnt) at offset 0x8703 10352 bytes
font_02_sfnt_off0000aa55.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA55 4324 bytes