Malicious PDF — malware analysis report

Static analysis result for SHA-256 1264e55fcb0e16ae…

MALICIOUS

PDF

46.9 KB Created: 2020-08-29 11:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0c9f11183c14deabd6ab15ae9009c05 SHA-1: 639b16b5dfdaf8dcd5b41609f5ed6a4a7eee7700 SHA-256: 1264e55fcb0e16aefdbe06517ada6f1d17fec7690ebb67d6786d9980560fda96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, many of which are hosted on Shopify. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the malicious URL and several Shopify URLs.

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/wix?keyword=1.67+%25C3%25ADndice+vs+1.61
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/dammit_janet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/narikited.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/42446998751.pdf
    • https://cdn.shopify.com/s/files/1/0437/5363/5989/files/toras.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/zemunezoxoxivezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/how_does_botryoidal_hematite_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/1766/5703/files/configurer_proxy_jdownloader_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/mafixujofekijigokig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/32974234463.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_off000076ea.bin
4bb7c2ec19a1b57de8bf86cb970a0e214a87e90346562ea1cb0aa0ff0e901a9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 4932 bytes
font_01_sfnt_off000087d9.bin
d7299710ceb96d97247e005ed21a47804ae27d96d94d6674f97f350d8dee70f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 11700 bytes