Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e5c348a5818d6c…

MALICIOUS

PDF

42.0 KB Created: 2020-10-26 08:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c529a611c2c4879da2ab950c7ef517c SHA-1: 73f37a5d3514e3df47856a280fc75f9e5697de08 SHA-256: e1e5c348a5818d6cd26157ee5c0ddb3c7fc160d079e8e6863268113db4cad5de
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, gettraff.ru, which is likely used to distribute further malware or phishing content. The document body and embedded links also point to numerous other PDFs, suggesting a link farm intended to manipulate search engine results for malicious purposes. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to 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://gettraff.ru/wb?keyword=moodle%20tutorial%20for%20students%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f872fc87fc8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8b195e18618.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/6049003.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/944e5c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8b1e653f69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f95c3b9a1dad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/mikhail_bakhtin_carnivalesque.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/cloud_computing_security_risk_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/xisafademokalilax.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/64421830071.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/antioxidant_activity_of_nigella_sativa_essential_oil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0804/3425/files/rufoxidolaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9024/5285/files/tavolubuvugeliwuxisadomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3090/8575/files/49380110910.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/miwanakosadewozus.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/fufup.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/california_employment_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/human_development_in_psychology.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_off0000657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5040 bytes
SHA-256: 3708f64b273f4bcb2eac139822e8f100cc5d7750ad7d0b282ae2cff24673ea1a
font_01_sfnt_off000076b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6 10668 bytes
SHA-256: f73a4894dc8e9ce2cd1603c239ef5ed27ffa811bd3e14a9148a87494ff9a54e6

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