Malicious PDF — malware analysis report

Static analysis result for SHA-256 998e0ba25462986d…

MALICIOUS

PDF

47.7 KB Created: 2020-08-07 00:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210f2545e88252ddee80614f736afc4c SHA-1: fa0cb648277c86c0e8d85dc04f659bbe1bf885bb SHA-256: 998e0ba25462986d36809ac1458869b2a4ddb93fc4a16a39418d82305b49a2ab
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to appear as legitimate PDF files. The primary malicious link, https://ttraff.ru/pify?keyword=alizarin+synthesis+pdf, is identified as a known malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=alizarin+synthesis+pdf
    • http://files.littleforeststudio.net/uploads/1/3/1/6/131607522/vofugem_vevetoledas_nanaroz_watokutisef.pdf
    • http://files.denverplacentaencapsulation.balancedbirthservices.com/uploads/1/3/1/8/131871863/tazotogebok_voluvaraxawerut_tebafoda.pdf
    • http://boworo.glintofmischief.com/uploads/1/3/1/4/131453247/6467803.pdf
    • http://files.donnawardlehman.com/uploads/1/3/2/7/132710601/2051286.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/77513200240.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/vmware_workstation_pro_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/1326356124.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/bosamiruwubifizefebafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/design_and_analysis_of_algorithms_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/mukajim.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/48882738888.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/15019885221.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8342/files/javascript_shuffle_array.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/application_of_gis_in_urban_planning.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/tijugelukelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/bovanalivowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/32949155584.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_off00007a57.bin
883c59940fb9763f4351ee1af7a98fe86fbcc97f7380eae840d25b23ec211a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A57 5272 bytes
font_01_sfnt_off00008c50.bin
27c1b42091eba8ee551bd97f3c8d2043b50eb792031c7f23b4a5467e6ca2b8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 11384 bytes

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