Malicious PDF — malware analysis report

Static analysis result for SHA-256 6527f4bf6c4c205a…

MALICIOUS

PDF

105.8 KB Created: 2020-08-19 20:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8e7b036d244e1180a6767edd90932f SHA-1: 8c3ecfc64c36d11be7eec3fdb05143785ce778d0 SHA-256: 6527f4bf6c4c205aac22437979c3d716be97aa4aeb92830269f29da26be83cac
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous external PDF links, many of which are hosted on Shopify. The presence of a 'download button' lure and a 'password archive' lure suggests an attempt to trick the user into downloading or opening a malicious payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=anarkali+malayalam+movie++480p
    • http://files.michaelsawecki.com/uploads/1/3/1/4/131413148/3548276.pdf
    • http://files.detroitcomposersproject.com/uploads/1/3/2/6/132682970/4699624.pdf
    • http://sevoda.bbeboutiquellc.com/uploads/1/3/1/4/131407406/zakamu.pdf
    • http://files.amberstope.com/uploads/1/3/2/6/132681812/488371.pdf
    • http://���������
    • http://bltlly.com/129kcoDownload
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/adjetivos_comparativos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/fijiveredek.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/dim_sum_menu_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/blender_modeling_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/daliso.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4679/files/kalumonobobepuwivumevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/biology_mcqs_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/78808807757.pdf
    • https://cdn.shopify.com/s/files/1/0440/0565/4678/files/29479248127.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7996/files/13121740856.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013971.bin
8704369a7ff6b3f21d05dbc53a4cf0f6de714f7e21a9ae35fb5355cbd6e4d832
pdf-font-stream PDF embedded font (sfnt) at offset 0x13971 5424 bytes
font_01_sfnt_off00014bd7.bin
3837fb53d0e6b5bc7289472e42abb714045c69a6bb6521e3b8d0ab79c8c2a8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD7 17732 bytes
font_02_sfnt_off00018202.bin
77acd0f26c3709019931729c3b6608e47a5261073b4bf4cbd8aee7bf28a42783
pdf-font-stream PDF embedded font (sfnt) at offset 0x18202 16384 bytes