Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d709537b1b1ae26…

MALICIOUS

PDF

68.6 KB Created: 2020-11-23 07:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e663791f102ded4bd88175aa32240027 SHA-1: d03a870b3c0ee2ae0d4027a3aac741673afcfbf1 SHA-256: 1d709537b1b1ae2611cb3063da2eef9d3a33c0bd307371dc9e69508ccf0f2fe7
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector link and a link farm. The embedded links, such as https://cctraff.ru/aws?utm_term=mtg+archenemy+rules+pdf, likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/aws?utm_term=mtg+archenemy+rules+pdf In PDF document text
    • https://vudujetejagug.weebly.com/uploads/1/3/4/6/134674723/63a60db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f88c19e37a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_5fbb29ab58491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f8d2c5d7c277.pdfIn PDF document text
    • https://mamaganonofob.weebly.com/uploads/1/3/4/6/134602085/478916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_5fb27d9104956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5fba28ce0ad01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5f94b15368cce.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/nujolabunef_sovevamuzuri_xuwaxesasiw_magosezogife.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/04074c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/adverbios_de_frecuencia_en_frances_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/cisco_2960_x_series_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/34793918812.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/which_one_doesnt_belong_worksheet_math.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/kopekekatulifozisexetuxe.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_off0000ce75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 5676 bytes
SHA-256: d27c1f0f83e39f8eda2d33a8f9dcac70ee2a9407249466ddc082aedd9cba6be2
font_01_sfnt_off0000e1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B6 10408 bytes
SHA-256: 00958b8882999e21f0f6b7265c8e4812f8345dab32de94508902bd732cc4acae

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