Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd66d8acade0d0b3…

MALICIOUS

PDF

43.6 KB Created: 2020-09-03 00:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9fbda751c548ed2975165594913996e SHA-1: f842d7aad1767e1132dcf684a3d5bf22c923f7bf SHA-256: cd66d8acade0d0b3bcf9566bb620b167e76bf49c8f29f10a61a03b9bb2a640f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically disguised with a "hypixel skyblock report scammer" keyword. This suggests a social engineering lure to direct the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various documents, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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=hypixel+skyblock+report+scammer
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/wexelopujelija.pdf
    • https://cdn.shopify.com/s/files/1/0435/5964/9429/files/etapas_del_metodo_cientifico_busqueda_de_informacion.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/basics_of_battery_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/sociology_summary.pdf
    • https://static.usrfiles.com/ugd/764aaa_536836a2f5f3416dacfb609932a0b8bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_82c0bf740d0c4bbcad856d7bcbf0050f.pdf
    • https://static.usrfiles.com/ugd/724bd4_4d8c5a6beaac43988ed03a0cdca13563.pdf
    • https://static.usrfiles.com/ugd/1f6d71_764236f45de54811a9b84f6633c71c3f.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/57873042487.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/figetemoxegem.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/comment._php_wordpress_template.pdf
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/68170689083.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/ragnarok_ninja_skill_guide.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ba.bin
510410fb6e852b3118185f2dade02637c35871739b77d3e3d533d4d2239b4d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA 5412 bytes
font_01_sfnt_off00007818.bin
3a0a018bb46c923f05cad83c109a8cff46be9fc481342c92432c289ab362cba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 12876 bytes