Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ec0fe549f55da1…

MALICIOUS

PDF

48.1 KB Created: 2020-09-19 10:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f7bb9e7a9d9e9fe3fe88780b7f0ea354 SHA-1: 64550202fb47ed0dd1a5cd5cd763fd130e1f68ae SHA-256: 68ec0fe549f55da1d60901d9e87aae52499300957702fc710aca829591d99e45
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=flour+bluff+elementary+principal, suggesting a lure to a malicious site. The primary function appears to be directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.com/wix?keyword=flour+bluff+elementary+principal In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24e58d81-a62a-442d-9442-3c77196ea496.filesusr.com/ugd/405339_f3bfed6ee2fd48219cc64fd94b7a9997.pdf?index=trueIn PDF document text
    • https://2253008d-ddfc-4b50-9b7e-4369f6bd527a.filesusr.com/ugd/c2bf0a_9f2ab2308b4b4ad7bd722f92456891b8.pdf?index=trueIn PDF document text
    • https://14b3ea5f-67a4-4c57-89cf-e2ab0e924e1c.filesusr.com/ugd/4aae87_69296a3024f94c0eac1d5921c55e5189.pdf?index=trueIn PDF document text
    • https://3f25dd9f-3614-4f1d-a894-2d288cdfd54f.filesusr.com/ugd/1c44ce_b308310ca3c54b70af27cb9cde96d5a4.pdf?index=trueIn PDF document text
    • https://3d7a50b0-6b56-4f81-92ce-d1e544e28a46.filesusr.com/ugd/865d50_80d637e037244b078c66f469286d53c6.pdf?index=trueIn PDF document text
    • https://b9f9532a-abd6-41d8-80e2-956eead7e37b.filesusr.com/ugd/974a4e_8ce106d47a5f472b83fb2ea27183dd76.pdf?index=trueIn PDF document text
    • https://bbd7e453-18d1-4542-82a0-35b60f6e0252.filesusr.com/ugd/4d548e_3ced8a0fb1814df88311fa9fa12984ec.pdf?index=trueIn PDF document text
    • https://fa62787e-346e-4dd5-9342-eaca4a817e43.filesusr.com/ugd/1e52da_03c3a3b53d984cee8236ab13f7dac765.pdf?index=trueIn PDF document text
    • https://d06dc0a7-ac2c-4163-8470-b6fb3208b649.filesusr.com/ugd/d17951_e68fe465bff24ff39f9502b4ec121e00.pdf?index=trueIn PDF document text
    • https://ed58e239-bb99-432f-95a3-42d227e9c383.filesusr.com/ugd/e6092c_20431dbe92d74bba9c0e80c83df0a7dc.pdf?index=trueIn PDF document text
    • https://90818ef3-947c-4e8a-906e-135b9ba20842.filesusr.com/ugd/8b49c6_dc8e01ef106642b68723c5a131c77a73.pdf?index=trueIn PDF document text
    • https://146405b1-7178-4ed3-92af-bcde5c8f91e1.filesusr.com/ugd/2e16aa_05a05eb2a61541dd8922aadc2ebd9935.pdf?index=trueIn PDF document text
    • https://2097365d-8797-4482-89f4-622aeec60e30.filesusr.com/ugd/dba42a_e89dac83a59f46ecaa20dbd9f83d8d07.pdf?index=trueIn PDF document text
    • https://b7227182-188e-4d8a-955c-761c9881c123.filesusr.com/ugd/99965f_a7924398fd6c403d9288a86f229f5e48.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/19085956600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/gigiwidalosenelenojiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/73786612124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/plant_dna_extraction_lab_report_discussion.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF9 5180 bytes
SHA-256: cba323b79c0164a631f2eef63a986c5de6dac7c2974d349429cc4428312c3b37
font_01_sfnt_off0000818e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 15356 bytes
SHA-256: 40f5afab95381a230c7d0d42d489edca38afaf938caa4acdca8d327e26661d3a

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