Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a8fe0ad5890cce…

MALICIOUS

PDF

75.8 KB Created: 2020-12-27 09:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 973778538045e51d233cb303bc834d23 SHA-1: d697d013bdf0e38b3b182c1936018913677c8c94 SHA-256: 98a8fe0ad5890cce8dbd5d6c8bc9653966e576f5378abb7461669182ab418166
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a malicious redirector. The primary link directs to 'ggtraff.ru', which is flagged as malicious. The document body is heavily obfuscated and appears to be generated content, further supporting the malicious intent of redirecting users to potentially harmful sites.

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://ggtraff.ru/strik?utm_term=small+fold+up+wall+desk In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/hefQjdj/falaxipekibuvajot.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/Njipgjh/download_zedge_free_ringtones_and_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jbXjfjf/xomit.pdfIn 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://s3.amazonaws.com/savukojubusum/guided_meditation_script_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda131e0-ff23-4227-b366-817959285429/29457845203.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/samovizebaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/xidupiz.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/82910736858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33806bb-d5dd-44dc-afb9-792c934fe65c/nasojipiredoxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf0fb6a-b078-4ba7-b338-9fc346459d0a/sims_3_origin_code_generator.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA8 4996 bytes
SHA-256: ce55a74312a9822479619c4b9a665214ce0725bd88969c7f502fc78c51d390ea
font_01_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 11044 bytes
SHA-256: 65e00049b14fa582e3585c6ef34c7ed0e65b388f261d39776432df5fffc9172f
font_02_sfnt_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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