Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47b5e8ba1d30a2d…

MALICIOUS

PDF

46.6 KB Created: 2020-07-07 11:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 34bc164573f491b326b2cf19df429a68 SHA-1: e455904358e9241d3d0defc5189f2e3c3203d1dc SHA-256: b47b5e8ba1d30a2d4d4fd4c312ef4c7c1c7a252d9e926b1021798e8054e87e1e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link farm and a redirector link, indicating a phishing or malicious content distribution attempt. The primary malicious URL identified is https://ttraff.ru/wb?keyword=english%20grammar%20voice%20pdf#english+grammar+voice+pdf, which is likely used to redirect the user to further malicious sites. The document body text, though obfuscated, contains references to the URLs and the deceptive 'English grammar voice pdf' lure.

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.ru/wb?keyword=english%20grammar%20voice%20pdf#english+grammar+voice+pdf In PDF document text
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdfIn PDF document text
    • http://files.balloontwistersdcvamd.com/uploads/1/3/0/9/130969375/gipagazovupibiz_tolokaduwimola.pdfIn PDF document text
    • http://files.poleshiftnews.com/uploads/1/3/2/8/132815961/493882.pdfIn PDF document text
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdfIn PDF document text
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdfIn PDF document text
    • http://files.dorebowen.com/uploads/1/3/1/6/131607174/3994866.pdfIn PDF document text
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdfIn PDF document text
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdfIn PDF document text
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://remisufuji.files.wordpress.com/2020/06/89400411388.pdfIn PDF document text
    • https://tipubek.files.wordpress.com/2020/07/bevepuxadogejuk.pdfIn PDF document text
    • https://rawatereg.files.wordpress.com/2020/06/xuvusatil.pdfIn PDF document text
    • https://jupurugasu.files.wordpress.com/2020/06/52567605607.pdfIn PDF document text
    • https://butisukumig.files.wordpress.com/2020/07/vadikerapizazedotepi.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_off00007a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 5292 bytes
SHA-256: add9ca3a0a05961fe6dd3e28dbaf625503468d282ca482d1eeeb55ecdfff0935
font_01_sfnt_off00008c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3C 10076 bytes
SHA-256: bf4dc6689397a88057241938118db3a246a733594d03448af8c0a36f3d9451c6

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