Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e24cfa6387ce419…

MALICIOUS

PDF

55.6 KB Created: 2020-08-30 21:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d86e44a44867b443d0680f8ed6aaae4f SHA-1: aeffc001287b3d586ccf5a8edba0c2d6896d4ccc SHA-256: 5e24cfa6387ce419a5f758efa0607fa33ad3c2955ff784a6e8e43ba002a6aa3b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.cc/wix. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'wkhtmltopdf', indicating it was likely generated programmatically to host these links. The primary intent appears to be directing users to malicious infrastructure.

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/wix?keyword=waiting+on+god+andrew+murray+quotes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/wikixakatitosizudon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/26875145969.pdf
    • https://cdn.shopify.com/s/files/1/0435/5558/6203/files/mipuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/movewuzekoxananimaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/3322164116.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/breaking_dawn_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/google_classroom_apkmirror.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5831/files/agreement_on_safeguards.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/47651921745.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/25895463455.pdf
    • https://static.usrfiles.com/ugd/b77b08_a72550397fdd4fe2b7bafc62bba90493.pdf
    • https://static.usrfiles.com/ugd/6290de_a3ad0ac9496a4b518068460712f57d9c.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/92516550254.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/anhedonia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4470/files/pawonosiwupojominadal.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_off00009cb5.bin
0a0eced9947a8dc3ab28e5e3447ccb25d7583950c313b1f6289734df4bf32793		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB5 5444 bytes
font_01_sfnt_off0000af33.bin
0bbd8cad9652647bffa4565ff6681575917c5190e8199df9079c9a481bef9f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF33 10088 bytes

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