Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7c698e19a56c28…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 11:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bed93306d17e92252e754591cf438f8 SHA-1: 186b9184b4e5b1f276d97f35ce198f93320bc3e5 SHA-256: fa7c698e19a56c28ca6a2c140d8dbab3d3ea56debfcaa4391db14cebeff815c6
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free template download. The ML classifier strongly indicated maliciousness. The primary malicious URL is https://ttraff.cc/pify?keyword=free+templates+brochure+design, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL.

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=free+templates+brochure+design
    • http://files.ccaradio.org/uploads/1/3/1/0/131070711/2758871.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/xasugivowigatu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6161/4494/files/gerao_de_energia_biomassa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/xisamaxitog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/tujulizunanadajasefozev.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0673/files/mumefed.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/core_values_assessment_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/33891469429.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/tadozofugopev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/zamuvavujejofomod.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/42705465928.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/rofafurosobatekatixikor.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_off000063e3.bin
c78e7d8cf56edf7ba28be6c46ce23d7dba4afb588862b94ff0abb4de30b8fb01
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 5580 bytes
font_01_sfnt_off000076aa.bin
4733197fbe571ea0d96c19493f2764cf31bf3a4df7f207fd160993984f2b5a39
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 10096 bytes