Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e57fc61564f329…

MALICIOUS

PDF

38.7 KB Created: 2020-11-03 05:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 258cce325eb33bdb9bf5498a10f2c0e9 SHA-1: 8d2c8ea719235e835b909ac58b2426a96300c117 SHA-256: f9e57fc61564f329e8b959b545de5223d9ab6a14622c9f0360471278c5b78aa1
194 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 redirector infrastructure and SEO link farms. The primary malicious link identified is https://cctraff.ru/aws?keyword=growing+hunger+1+part+3, which is flagged as a known malicious redirector. The document's content and structure suggest it is designed to trick users into navigating to malicious websites, likely for phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/aws?keyword=growing+hunger+1+part+3 In PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/8032810.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/5200784.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/vibabizuzikenuf.pdfIn PDF document text
    • https://koxokigibobov.weebly.com/uploads/1/3/4/6/134600250/674142.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/4924169.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/tizuf.pdfIn PDF document text
    • https://wojawafelufofux.weebly.com/uploads/1/3/0/8/130813934/4661938.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/begigud.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/bevekizadoxuj/nuzijotez.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/the_ancestor_s_tale_richard_dawkins.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/xupumeponegiwaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7286/3399/files/cricket_19_apk_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/classzone_answer_key_spanish_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/surah_waqiah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1359/1989/files/scientific_method_diagrams.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/xipudilisutakirinu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D7 5212 bytes
SHA-256: 6db29d67aace9998ccc35e5d77d87ed9003a91945a10d93b951d8bc13fd22745
font_01_sfnt_off00006ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 10460 bytes
SHA-256: 55504c50d383232a797c7c05dcfa856e687400b580b25029241723c632c30292

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