Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c46b77e30aa450…

MALICIOUS

PDF

34.0 KB Created: 2020-08-29 19:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 915925f78b1d3b0e3ebd339bde9a27c9 SHA-1: 0008e47f47bb70b4c4259da1cda3bb61e147a06f SHA-256: 11c46b77e30aa450811a125157ad71508c73e86efdcceff07b4ce29fb8eb4855
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated but contains a URL that matches the redirector. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=koes+plus+mp3+kembali+ke+jakarta
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/historia_del_alfabeto_griego.pdf
    • https://cdn.shopify.com/s/files/1/0437/6762/7928/files/16254723415.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/bioreactor_types.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/aggressively_organic_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/lefiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/59686531232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/23167884517.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/13356231357.pdf
    • https://static.usrfiles.com/ugd/9b5f63_b815d1cbe4be490dbb9a9bf40a9d4360.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_8635ac22e58b4a18842a0f33723b76ec.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/journey_to_the_centre_of_the_earth_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/browser_vpn_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/3281/2439/files/62261035034.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_off000046c3.bin
d1d252894b2ad35b64551c2544335a45c9f66415cb9d06018ff7c530df0773c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x46C3 5380 bytes
font_01_sfnt_off000058f2.bin
d6351991fbaf9b4c2e46267317ffa6111adeaeed3c6ac680635b975cf5f321bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x58F2 10044 bytes