Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d978c8d2a5f9b6…

MALICIOUS

PDF

35.1 KB Created: 2020-07-08 14:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: e0acda17daf6a204aa2fc30add4cb22c SHA-1: df6f37f63849b152969e1fa8d0ef1e8401d12e66 SHA-256: 66d978c8d2a5f9b6b23770559d2a251845fcfb6947c505999928917a66b94b72
184 Risk Score

Malware Insights

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

The PDF document contains a large number of links to external PDF files hosted on disposable domains, indicating a link farm designed for SEO manipulation or to distribute malicious content. One of the primary links redirects to a known malicious redirector infrastructure. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent.

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=delonghi%20nespresso%20lattissima%20coffee%20machine%20en720m%20manual In PDF document text
    • http://files.ganetsinai.net/uploads/1/3/1/8/131858481/9075828.pdfIn PDF document text
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdfIn PDF document text
    • http://files.sweetmaplecafe.co/uploads/1/3/1/4/131438468/6831050.pdfIn PDF document text
    • http://files.bluelanternstore.com/uploads/1/3/1/3/131383383/3244715.pdfIn PDF document text
    • http://files.womenartistsreaction.com/uploads/1/3/2/3/132302863/8d22be5d98d153.pdfIn PDF document text
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdfIn PDF document text
    • http://files.letspaintarabic.com/uploads/1/3/1/3/131379612/22ab9b14a11.pdfIn PDF document text
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdfIn PDF document text
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdfIn PDF document text
    • http://files.mountaineerauctions.com/uploads/1/3/2/8/132814239/5ff98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wijapavowo.files.wordpress.com/2020/06/46347221725.pdfIn PDF document text
    • https://besuzoze.files.wordpress.com/2020/07/gogubazexifuripifejobabub.pdfIn PDF document text
    • https://mozufata.files.wordpress.com/2020/07/keguwaponimipi.pdfIn PDF document text
    • https://dubelotob.files.wordpress.com/2020/07/82587950948.pdfIn PDF document text
    • https://fukoboseniki.files.wordpress.com/2020/06/sulalofufafafedafizoboj.pdfIn PDF document text
    • https://vekokipevi722356982.files.wordpress.com/2020/06/vodubejazuso.pdfIn PDF document text
    • https://serumaputafe.files.wordpress.com/2020/06/49145277782.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_off00004d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D70 5664 bytes
SHA-256: c3299f046e7ac7a780e2096c62bb58d0c032405e3151ace153c1f28f7179b8e0
font_01_sfnt_off000060a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 9088 bytes
SHA-256: b2e0ab40e6888bf8b13c985cbab841b9563c4421d8b9be401fcd135e5c2a4d55

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