Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db5f8392351687e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 18:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21cdcf3d6fcb62ee88ffe86a23289113 SHA-1: d29673775053927ae2b8173ac4c63314e5bd8ac9 SHA-256: 2db5f8392351687e670124b706d954d1d25b26fb744bf0d9eca565a6888fd117
154 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a resource for "Powerpoint presentation templates change". This link, https://ttraff.cc/pify?keyword=powerpoint+presentation+templates+change, leads to known malicious redirector infrastructure. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious intent. 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=powerpoint+presentation+templates+change
    • http://files.digistitchcustomapparel.net/uploads/1/3/1/3/131398145/1790422.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/hedonistic_imperative.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/94461535097.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/36723574102.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/alessandro_baricco_selyem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/26011473853.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/cutting_edge_third_edition_pre_intermediate_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/83617524470.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/52131514527.pdf
    • https://cdn.shopify.com/s/files/1/0438/2618/4352/files/majobenoteremuvod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/97106427702.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/36037394586.pdf
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/campbell_biology_second_canadian_edition.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_off00005f6f.bin
1e891188642af6e87160c70f785235e9495a8f976e8024a82c45a305341ab023
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 5440 bytes
font_01_sfnt_off000071ca.bin
4fc38876dbf1dccfe8e9bd190550f13061bd512729bb102341b86d8d26617367
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CA 9864 bytes