Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bf20809104db9d…

MALICIOUS

PDF

41.1 KB Created: 2020-07-08 11:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 49435854d1409d62f05f8ea9e1629dd1 SHA-1: 1f808be8840d2f450ec3ef142814c32f7ef4745e SHA-256: 82bf20809104db9d1fc18e15868f33f22b2d8a1253f8e1ab66cfb7ba82caab17
184 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The document body is heavily obfuscated and contains a URL that likely leads to a malicious payload or phishing page. The presence of numerous external links suggests an attempt to manipulate search engine results or distribute further malicious 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/wb?keyword=business%20model%20validation%20what%20makes%20business%20models%20work%20pdf In PDF document text
    • http://files.sincityimprovserial.com/uploads/1/3/2/6/132695839/jujibenedegoxo.pdfIn PDF document text
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdfIn PDF document text
    • http://files.lampsfromtheattic.com/uploads/1/3/1/0/131070523/sexebupew.pdfIn PDF document text
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdfIn PDF document text
    • http://files.sounbulamills.com/uploads/1/3/1/4/131453007/7319016.pdfIn PDF document text
    • http://files.brandimcpeak.com/uploads/1/3/2/7/132710782/furadopuxapu_nirinig.pdfIn PDF document text
    • http://files.creamydreamysoap.com/uploads/1/3/1/4/131455463/d2d943b91b72.pdfIn PDF document text
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdfIn PDF document text
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdfIn PDF document text
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xokumawuv.files.wordpress.com/2020/07/zowixujakokatogiweviso.pdfIn PDF document text
    • https://fugebetowipo.files.wordpress.com/2020/06/25756429131.pdfIn PDF document text
    • https://wawakuji.files.wordpress.com/2020/07/37062354176.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_off0000627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 5568 bytes
SHA-256: 9ca8ed7194b998c22406f8992de541aa4cd366195a915e23083cce799fc2090c
font_01_sfnt_off0000753b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 10036 bytes
SHA-256: c46678aa74163274eee8d519b9670c9dbbd17be8485608806ae7c07d5ddd7a2d

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