Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8ca805b6a8f25d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 00:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3381b522f69af4eafddaefca7d6aaeda SHA-1: ad789808d0229669a8ac5ac21eb93ae4252cb2c9 SHA-256: 5e8ca805b6a8f25d6bf01d736e6756c5738154521947cd23e5c638d138486cb3
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a fake download. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms the intent to lead the user to a harmful destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

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=mankatha+theme+song+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8184/2332/files/wumijutugiwavimonaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/55194360503.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/57857825118.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/56951448090.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/21839901013.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/47123153325.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/vasozalurikob.pdf
    • https://static.usrfiles.com/ugd/e02969_10b75ec4f45b45c1aeea7fef15c57a4a.pdf
    • https://static.usrfiles.com/ugd/b4a829_35ef2270b1404e179af63f46653cadf9.pdf
    • https://static.usrfiles.com/ugd/c1de29_46033e27f2b74069a50caa04897233c4.pdf
    • https://static.usrfiles.com/ugd/91e123_fcef2b7d743847579116049290108239.pdf
    • http://tinyurl.com/kgkvz4z
    • 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_off000056e1.bin
dc4f22fd418fe5d0057ae34aa34733198952a34898e40ffa8b8e2c04b3897559
pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 5480 bytes
font_01_sfnt_off00006970.bin
20efea71288e55905b88f92ea0280b40536c13beaa631d643686dafae9f88264
pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 15048 bytes