Malicious PDF — malware analysis report

Static analysis result for SHA-256 53abe299806a1a30…

MALICIOUS

PDF

49.3 KB Created: 2020-09-13 05:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33eb6fe443d7db89c81c5f3c0c615053 SHA-1: 0cbee842119016b8d8dce599d0e2702351f189ae SHA-256: 53abe299806a1a30eac2e5c63e3e3a886ee0384dce4b2c7c3859b8b00433e4a2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list, reinforcing the malicious intent of redirecting users to potentially harmful sites.

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.me/pify?keyword=gem+td+dota+2
    • http://files.colourmydoodle.nz/uploads/1/3/1/4/131452838/2827838.pdf
    • http://warufet.marianne-ward.com/uploads/1/3/0/8/130874588/993cca1.pdf
    • http://wurekap.rooftopmissions.com/uploads/1/3/0/8/130814172/wapakizofebe.pdf
    • http://files.claudiarachelle.com/uploads/1/3/1/1/131164021/xomasex.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/wajojewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/free_california_drivers_license_template_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/xetiterigididufajak.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/if_else_statement_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/fezozitotuwuvuvewujewivel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6039/files/basshunter_all_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2209/6283/files/lomodojega.pdf
    • https://cdn.shopify.com/s/files/1/0428/6860/5095/files/12_body_systems_and_functions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9b540fbbe147f8a512187bec583164.pdf
    • https://static.usrfiles.com/ugd/0f1814_d74237e20a004a21aa64da169227fb1e.pdf
    • https://static.usrfiles.com/ugd/49be48_f6079f7854e948ee898597222413b021.pdf
    • https://static.usrfiles.com/ugd/e6092c_89341ca841ae4cdd85b236cdb28758b5.pdf
    • https://static.usrfiles.com/ugd/83e584_a4d570ab6519400a88a46f20acd98c5e.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_off00008476.bin
2030376bc049e0b8bdebbd1a95641e3d050f96738333b3cc53a6a0af2992bb0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8476 4828 bytes
font_01_sfnt_off000094d5.bin
6c4731bd6fb71236a2004f6ef9b2bae11204bbec6876fa706fb957074b18b8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D5 10340 bytes

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