Malicious PDF — malware analysis report

Static analysis result for SHA-256 384d75a7ed74818a…

MALICIOUS

PDF

55.0 KB Created: 2020-08-07 22:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd231c28baed42d4e62aa0d49c099ae4 SHA-1: b79c2659e36fcc8a2bc047d9cb9066785c74af68 SHA-256: 384d75a7ed74818a17a6dbdcf9d8e5ab20b21fa975eefec0b09891864794f974
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. This URL is embedded within the document body, disguised as a link to a PDF about the importance of the agriculture sector. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=importance+of+agriculture+sector+in+pakistan+pdf
    • http://files.virtualworxbusinesssolutions.net/uploads/1/3/1/4/131410606/44628c73.pdf
    • http://xotelen.designersink.us/uploads/1/3/0/7/130739615/bidef.pdf
    • http://files.odera.net/uploads/1/3/0/7/130776661/7274924.pdf
    • http://files.williamevertson.net/uploads/1/3/0/7/130776031/c1fb9352d47.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/42074304156.pdf
    • https://cdn.shopify.com/s/files/1/0440/4648/3606/files/pukaredusanexudekuzome.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/76424064168.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/26463410616.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/58338670497.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/acuerdo_de_ginebra_1954.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/nexixejiponepidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/sulalikuwirip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/discord_isn_t_picking_up_mic.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/sap_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/bididipaxakokolomujuje.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_off00009793.bin
8f5c82f558f3db490cd0b0a6833f45ccf10b8a43eace585c943c59e81b5eafad
pdf-font-stream PDF embedded font (sfnt) at offset 0x9793 5476 bytes
font_01_sfnt_off0000aa1e.bin
ca5d8c2579cb2d9d86a246359dc80a30598bd8e52445edbbb01b6c12ecd139e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1E 10600 bytes