Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e48e0ba7dc98716…

MALICIOUS

PDF

46.5 KB Created: 2020-08-29 17:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbdcdd021d7659a7b1f3f7a2d0c59c55 SHA-1: 7414372e549b5d6d07c1baf45e0b09c68d8bab61 SHA-256: 8e48e0ba7dc98716033ed0f70499fd974b92331de24dd78e96295bf247bc9dcd
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Pendragon character sheet excel". The primary malicious URL identified is ttraff.com, which is known to host redirectors. The file also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic.

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=pendragon+character+sheet+excel
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/xikalesexitexuwojuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/font_awesome_file_icon.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/59226450292.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/descargar_biblia_reina_valera_1960_para_celular_gratis.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b943771cd09414485b7e159079aa3aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7b685709668464fbf2d94302f0d33ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_12196ea79af14e468be3da3af526be7a.pdf
    • https://static.usrfiles.com/ugd/b98abb_57a0fcbd31794b83b104541a3f54479a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da63428f93e4d8aa7d384ada091b80b.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8042/files/baror.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/81855624417.pdf
    • https://cdn.shopify.com/s/files/1/0459/9962/0263/files/bss138_level_shifter_datasheet.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_off00006791.bin
5bf909dbfca8b06333df5aba53483edb4c5f0b1219090a5f75d6e9a89f06791f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 5012 bytes
font_01_sfnt_off00007887.bin
b47ab3252e87fae533990042ff8a16754ca37df0403bfd8881b4b09562eacee6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 11792 bytes
font_02_sfnt_off00009f1f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1F 4324 bytes