Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdaac7b28232294…

MALICIOUS

PDF

92.6 KB Created: 2020-12-14 05:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 77fb4bfdb74313b3641e13ab74cd9f73 SHA-1: 746f3511c5e6b0d0da1bc49625076756c172e7b5 SHA-256: ffdaac7b28232294f6b6ca42d08259fc39c6c6da4034e15705818590b256db8b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additional heuristics indicate the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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://ggtraff.ru/strik?utm_term=hanuman+chalisa+mantra+in+kannada+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f8a6961cdb22.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/bazituliwi.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/3515049.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/siwejutifub.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/keteduwi.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/tujeviwakirawu/nba_2k15_myteam_servers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fca3bf-b8f0-4400-a471-c0dcf605e994/apa_article_review_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf60915-0839-4f3d-b180-2b2a119d852a/80311339749.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/siwobabogajugebulezowawup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc726861c59a74bd98f103d/t/5fcb68eb66ddd570b0f4d0bf/1607166188057/car_traffic_run.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ebb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEBB8 12908 bytes
SHA-256: 02512d51a16ffd672712aa2993060422ffa293ab7b20674ecdbdfdf2d0ad1246
stream_006_off00012c13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C13 24184 bytes
SHA-256: 365f86c4beae2f8645ddecfe7ae409291f2989d08b1d7eb223ca256c844a25d6
font_00_sfnt_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 2944 bytes
SHA-256: b315da9c493118d8e2c4753b5c3763f81960998777159ef51107ad2e8dbd1eed
font_01_sfnt_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 5076 bytes
SHA-256: bd22dd5d44ad5e4c4053178ef0f014495349e0f85481ec86b87507614c0847f8
font_03_sfnt_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 9644 bytes
SHA-256: 8e250236b58550f4bbfa2ea7a5520ef17af1ae7c7b1db34bd016725235619529
font_05_sfnt_off00015687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15687 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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