Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cbc58a1375b04b…

MALICIOUS

PDF

47.7 KB Created: 2020-11-08 14:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 81d98124a5f68f64bed20975453d2f37 SHA-1: c34a6d25f8e6f2119fbe054b0a70f091e39fd939 SHA-256: b2cbc58a1375b04bfa61c739d3fca9fb0046ab948424473f3802083b1db2531a
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://traffmen.ru/aws?keyword=cocktail+waitress+dress+uniforms, is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://traffmen.ru/aws?keyword=cocktail+waitress+dress+uniforms In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55869897-b70a-4962-b5d9-bc57c888485b/92448627720.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/physiotherapy_exercises_for_cervical_pain.pdfIn PDF document text
    • https://navukot.files.wordpress.com/2020/11/87134857455.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/the_house_on_mango_street_essay_quotes.pdfIn PDF document text
    • https://povojoboxep.files.wordpress.com/2020/11/rilegunubofulugapekabuduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3924acb3-9d66-4697-a3b8-91525c5ab049/72765857149.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/gevinenozupomu.pdfIn PDF document text
    • https://bowifipimu.files.wordpress.com/2020/11/ximir.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8eb806-86be-4d89-aeae-8c1dc2878471/nosesusewutumez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 3644 bytes
SHA-256: 77d9100dd6b5af1360697fa7c09e87dcccdc105c9f1c4c611996330b00c0ef34
font_01_sfnt_off000069d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 5228 bytes
SHA-256: 0b1f05533e658023129aeaeb8cefe24963bf5600cc655296a7c3eb72087badf7
font_02_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 11748 bytes
SHA-256: d01a89847f5de9d5d95579da9a6ad4a90201a68ff6d978ee2450d834ab9dc812
font_03_sfnt_off0000a202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA202 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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