Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88895624dec485e…

MALICIOUS

PDF

67.5 KB Created: 2020-11-23 21:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ca3a685b224b1bec051e84532886ad6 SHA-1: 33e9d1ba72fc33fcab2d5ebb798bfee8b2e61ac8 SHA-256: b88895624dec485ee1fc525efc92334b15600afc4ae9ef9051958d78bdb09b11
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector and a link farm. It contains numerous embedded URLs pointing to disposable hosting, with one critical URL leading to known malicious infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting its primary purpose is to host these malicious links rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=buddhism+a+very+short+introduction+p In PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/dopodivawimulu.pdfIn PDF document text
    • https://vasegalewi.weebly.com/uploads/1/3/4/5/134595350/latedew_wotesimeve.pdfIn PDF document text
    • https://gifidutuv.weebly.com/uploads/1/3/4/6/134666467/xamitalapaforifagofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f873c0584024.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/vurozit.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2bdc40-4a2d-44ee-b7dd-166d0fc8d672/23724622786.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/amy_garden_weighted_blanket_duvet_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bipugij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867ffb88-d6d3-4f8c-955e-22db3f2a8281/labisusupizunik.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 5492 bytes
SHA-256: 4c2c59fb14eb085030391ecc149f68a6aff321a31747ae69505699b88c6d9c1b
font_01_sfnt_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 11016 bytes
SHA-256: fb1e54b6ca62f865cc8225c9c52c7dfe1fb625c30257c91563f1ae2feccff784

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