Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccd0e9731a21b95…

MALICIOUS

PDF

40.5 KB Created: 2020-07-08 12:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: f69fccfc871f882b12ab8176abea2169 SHA-1: bd7652524bef9e758eca7399399fb07274940c23 SHA-256: 8ccd0e9731a21b9541fa45db3ea2927ef1150d2af84df886604d8c23cfe24fc2
184 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous links to external PDF files, likely to manipulate search engine rankings and distribute malicious content. The primary malicious link, https://ttraff.cc/wb?keyword=how%20to%20make%20picture%20pdf%20on%20phone, is identified as a redirector to known malicious infrastructure. The document body itself contains metadata and the malicious URL, reinforcing the 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.cc/wb?keyword=how%20to%20make%20picture%20pdf%20on%20phone In PDF document text
    • http://files.melissagunasena.com/uploads/1/3/1/4/131438468/josobivituraki.pdfIn PDF document text
    • http://files.messiahlutheransc.com/uploads/1/3/2/7/132710575/kanavasoboliw.pdfIn PDF document text
    • http://files.nrmorenorealtor.com/uploads/1/3/1/0/131070911/4f8081662.pdfIn PDF document text
    • http://files.kmagalski.com/uploads/1/3/1/1/131164351/abb77d868.pdfIn PDF document text
    • http://files.aau-rankings.com/uploads/1/3/2/6/132695839/4219303.pdfIn PDF document text
    • http://files.marileenielsen.com/uploads/1/3/1/4/131438840/327510.pdfIn PDF document text
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdfIn PDF document text
    • http://files.ritaprestonsviews.com/uploads/1/3/1/1/131163945/tixuk.pdfIn PDF document text
    • http://files.bluegrassstream.com/uploads/1/3/1/3/131384573/rotileterajesa_bedovapejul.pdfIn PDF document text
    • http://files.josephrsicari.com/uploads/1/3/0/7/130739769/terapidir_ranisokidolaz.pdfIn PDF document text
    • http://files.match-gems.com/uploads/1/3/0/9/130969243/waruxe-gibotusupuwe-viputefetapaj-walugogigebomev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://datigexomup.files.wordpress.com/2020/06/bujowuveg.pdfIn PDF document text
    • https://relexuxiwa.files.wordpress.com/2020/06/57405241398.pdfIn PDF document text
    • https://wakogokanexu.files.wordpress.com/2020/07/46330003664.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_off00006137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 5184 bytes
SHA-256: 4f91a2f9b639fabe2e74b6d8b4b74160f4be6a0778e9fbb24e7783e14f0e77b0
font_01_sfnt_off000072b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 10060 bytes
SHA-256: 08faf492c11f17c89109f28b53d854943b8953e1b13b95629e754c80ddac4a0a

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