Malicious PDF — malware analysis report

Static analysis result for SHA-256 134c3709a68563ba…

MALICIOUS

PDF

44.9 KB Created: 2020-09-18 06:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351916dfaf3c45e02782a5e1e9ead41a SHA-1: 6e58de8c1a86bc70a4bbc6635a6c34b729921c8b SHA-256: 134c3709a68563baf1d005e4b4dd72235ee91e53e4dc8d65fa783cc2fa6b4c10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to distribute further malicious PDFs. The primary malicious URL identified is https://ttraff.link/wix?keyword=baby+animals+worksheet+preschool, which likely serves as a lure to download additional malware.

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.link/wix?keyword=baby+animals+worksheet+preschool
    • http://difutud.jeffcofiretraining.org/uploads/1/3/0/7/130775797/1e88f0068ddc4.pdf
    • http://mirep.brazenface.com/uploads/1/3/1/0/131070109/zesemu-biliges.pdf
    • http://tifusux.trottereventcenter-ord.com/uploads/1/3/0/7/130775692/c0312b3.pdf
    • http://files.wavelengthscounselling.ca/uploads/1/3/2/6/132695543/f7270de5c126873.pdf
    • http://files.lincsart.org/uploads/1/3/1/4/131453684/11bebe9353a0dc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/vubixotivulirodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/zibulake.pdf
    • https://cdn.shopify.com/s/files/1/0469/9314/6008/files/retudefafol.pdf
    • https://3812090a-caa5-4330-aeaf-af4bcf2e9259.filesusr.com/ugd/ee4d88_9758c750485d4b089e7e4b4f08c7577f.pdf?index=true
    • https://07cb8cea-880f-4b78-94e1-aed6158812c2.filesusr.com/ugd/c75f60_b4b5b318f6824ae2a045078c7fa8839e.pdf?index=true
    • https://1f112359-ab5d-41d8-a013-ffffa04f8f8a.filesusr.com/ugd/bc0b97_daf19d3a0525455eb7be474809438a3d.pdf?index=true
    • https://b23260b2-9ce1-4607-b667-5857a3aa4098.filesusr.com/ugd/ceb2e8_e68a618f7bce4e4da4ba2d1187df3e74.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/bigapinozatavulusude.pdf
    • https://cdn.shopify.com/s/files/1/0433/2204/8667/files/aluminium_foil_container_project_report.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e6.bin
1c67d6dc55d068e0ba2a868d4316a9317f872cc71f69eabb8bdfd82dec250e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 5408 bytes
font_01_sfnt_off00007424.bin
50f960d00ad7ec3e3a7bea739051d0c30fd3ec9ee5b92d409326f3ee779362bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 10652 bytes
font_02_sfnt_off00009893.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9893 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.