Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe96fa6c38d943e…

MALICIOUS

PDF

40.9 KB Created: 2020-10-31 08:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 891fcd9dd91416f1b105e89c223c21d0 SHA-1: ba9656cd617dc3ed79ebdec9f8c75cf3b24eaf5e SHA-256: ebe96fa6c38d943e74e605756b5257ec2f1db259cee7927a13a38d00ac227df1
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/123?keyword=what+is+the+periodic+law+of+element'. The document body also contains this URL and numerous other PDF links, suggesting a link farm or phishing attempt. The ML classifier strongly supports the malicious verdict.

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.com/123?keyword=what+is+the+periodic+law+of+element In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8717687e8ee.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/c2f7ab874dd1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f95055601102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7016/7486/files/retajutubafetir.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/modimanorikisanulebazona.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/tuzatogesanokozipa.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/midigit.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/open_mic_comedy_orlando_saturday.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/natural_causes_of_air_pollution.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/big_ideas_simply_explained_sociology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7877/0848/files/pengertian_pupuk_za.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/wubutexuguxawig.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_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 5500 bytes
SHA-256: dff05d49b39d9d6ea765768f3c8ee195b06acd5eb54ba0b892eea5d79d130f78
font_01_sfnt_off000071bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BC 10916 bytes
SHA-256: 1f1f922eed190dc9644967f62fed7cdc43a8fdd143467ab59c4f56875309817d

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