Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cc7c35277a54ec…

MALICIOUS

PDF

44.2 KB Created: 2020-08-02 15:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48ec2d8011d0cce57cc779e946761ce2 SHA-1: ac8a5f9b8e92ce60a1e54d0e0af0a4ec48635767 SHA-256: 18cc7c35277a54ece87cd548080b76e2cc4dfd2d59438d8b9498aa8188fb3926
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. However, one critical link redirects through 'ttraff.cc', a known malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=neopixel+ring+code
    • http://files.lilyhockcreationsfoundation.com/uploads/1/3/1/4/131406356/3595815.pdf
    • http://files.thestagecraftagency.com/uploads/1/3/1/4/131454850/7762037.pdf
    • http://files.faubertminiatureschnauzers.com/uploads/1/3/1/3/131381681/7190313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/wetexozubukulera.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/vovokuxunebalobozoxigum.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/54821790017.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/vowewowibeninole.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/bilapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/goxojizagit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/bojafufenexonapila.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/jekobuwejotogimejaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/17525544294.pdf
    • https://vine.co/v/Mwwbi5a1BFK
    • 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_off000063b5.bin
64d868b03c2b622dcd5428ae0091f607a7a3922a0e0a003fff416af60017f954
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B5 4888 bytes
font_01_sfnt_off00007475.bin
0f6b78e355f6f6a9e20a0395e17c021685b0ee2e67083e7befbd624feeb32c87
pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 15392 bytes