Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee1328ed1895a82…

MALICIOUS

PDF

38.1 KB Created: 2020-08-03 11:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd4449ebcc8cb4f1924d5a7d64c4f04 SHA-1: 348da9841f9bc6d684ffa1a224270b6631bdf481 SHA-256: 7ee1328ed1895a82529d291fae0da3231468ed8ec7806e8e1ac7acb2d82b1be6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests the document is part of a link farm or SEO manipulation scheme designed to distribute malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=addition+and+subtraction+word+problems+worksheets+for+grade+1+pdf
    • http://files.newlookwindowcleaning.co.uk/uploads/1/3/1/1/131164479/kosulugotinivo.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdf
    • http://files.rol-ministries.com/uploads/1/3/1/4/131437472/rokiwozipazolisi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/r_android_gaming.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/83668034770.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/rukexup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/80758516954.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5621/files/13683004959.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/vuvumoxanenuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/74756018726.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/jaxesutujajufofirog.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_off000054d0.bin
4116edf860c8c8f25a3316e21e43c6602853a4194fde4aa52074ca130cafe23f
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D0 5904 bytes
font_01_sfnt_off000068d8.bin
5bfcd5a6671ddce6506ebcd80a218c6ea550383e3d14b59501fa5072cd42567e
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 9996 bytes