Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbb2acf78d4bbc6…

MALICIOUS

PDF

64.8 KB Created: 2020-09-05 00:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd24fa6adc78d055fcbe873f9aa1a65f SHA-1: d139206abb50a76811e89f34901405e401647b8c SHA-256: 0dbb2acf78d4bbc690450c420a2bdcb559a4c4e939207c3f650de80767a521a3
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.me/wix?keyword=wendy+williams+news+reporter+niece'. The document body, though heavily obfuscated, contains similar text, suggesting a lure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially spread 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.me/wix?keyword=wendy+williams+news+reporter+niece
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/6649/0779/files/waneresavadoxiporel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6088/6694/files/63624718236.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/xobagipenawufemasalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4311/files/file_path_format_in_linux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/38903170931.pdf
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/livros_sobre_meio_ambiente_em.pdf
    • https://static.usrfiles.com/ugd/b8c837_8725122567ee40dab0aea424436dcdea.pdf
    • https://static.usrfiles.com/ugd/590778_682c4ee12c6c4f44880c8023b1048941.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/vakufifubijiji.pdf
    • https://cdn.shopify.com/s/files/1/0466/7808/1701/files/coliform_test_for_water_analysis.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_off0000bdec.bin
6b9a9e968ccff6bfefe0f5307b2dd6fd92fee6bfe03d3484160bf48845b819a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEC 5428 bytes
font_01_sfnt_off0000d069.bin
9fc891418e8448efa7394a9dfdf87e59848b541524609e3d177a96781e879704
pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 11016 bytes