Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c00f85248a8b7f2…

MALICIOUS

PDF

36.5 KB Created: 2020-08-06 09:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b634fdea89c9b8d67a07e27b47df175f SHA-1: a275ccbef444c716795f019c72fd8f32037c9b4a SHA-256: 6c00f85248a8b7f2c4b4c55f6d8f90e788f634b8e1f69c5fe2a46dc9246ac027
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, including a known malicious redirector. This suggests a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=allelopathic+effect+of+lantana+camara+pdf
    • http://files.patriciagodden.com/uploads/1/3/1/4/131483019/5adf2.pdf
    • http://files.noamonn.com/uploads/1/3/1/4/131437615/4023781.pdf
    • http://files.yogaconnectionukiah.com/uploads/1/3/1/4/131408741/6810663.pdf
    • http://files.muellerhomeenvironment.com/uploads/1/3/1/6/131607103/c4118120827f703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/xibaziganonomofunorug.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/57873530277.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nomeboxamejuzuvoxilinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/dijogurep.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3192/files/swg_officer_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/ludar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/editorial_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/14251112214.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/58785423212.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005162.bin
77a37cd74a718ba0203f39b27af243acc58eb8aa1919ac90925aa90d864326f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5162 5204 bytes
font_01_sfnt_off000062ee.bin
998008596a7608988affe2a79c4339eda4abe203bcb62799756919fe5e57025e
pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 9908 bytes