Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c0ca508e362b3a…

MALICIOUS

PDF

120.7 KB Created: 2020-08-04 21:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b52698013542a6989c029ed91c6257b SHA-1: 32a2b43886ae210d9e8186cac359d9d8f74ce0c7 SHA-256: 76c0ca508e362b3a146ae426c4580b0fd7ae22c71e2692d0aea15146c5c63ab5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external PDF files, many hosted on Shopify, and one primary malicious redirector URL. The document body, though heavily obfuscated, contains text related to an esoteric tarot course and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms malicious intent.

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=curso+esoterico+de+tarot+e+cabala+pdf
    • http://dewosuvam.evansmstheatre.com/uploads/1/3/1/4/131411896/6bb08b00772c.pdf
    • http://files.dpm-landscaping.com/uploads/1/3/2/7/132740951/viwakitawatapo.pdf
    • http://files.mauiwaenaband.org/uploads/1/3/1/8/131871569/b3d8ee743e0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/vabizazabatudunomiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/66190123428.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/82475245895.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/71197446392.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/futazufupisigizev.pdf
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/vixiwikowigovabelel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/4890484546.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/44326723046.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/48177860527.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/66810436789.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/62006746271.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_off00019f81.bin
902ac3d9a8491178f68f9367dfb7237e3244e1ae4b62987cbb7ac852189c2cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F81 5196 bytes
font_01_sfnt_off0001b130.bin
d15de750c9fb0b0f752d3ad9fd91a2625f65c99293c46195e3193ad22b42cc02
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B130 10932 bytes