Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fdce51dbaa630e…

MALICIOUS

PDF

78.1 KB Created: 2020-12-14 22:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7a154d3c0b0621c7e7f96fae6f8f5130 SHA-1: 4537b0980366ea5cd69c6c9467f1c68dff4fb5ff SHA-256: d5fdce51dbaa630ef0eabb5160e5e3d9dd93a0594e3bfd21bf5805bb6a646356
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=bob+marley+album+best+of In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f88806cdc25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f88a9885d961.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/830664e3-2d83-4336-a512-c47e90db751c/12783259963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8a06eb-f698-4ca9-8916-a3d48319209f/deme_emrine_itiraz_dileke_rnei.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295fbedc-470a-45f4-a597-2a421d877d0a/22730325218.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/justin_bieber_baby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72aa52c-61d4-44bd-b957-f76b9e87da2c/vb-mapp_milestones_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6157d8ce-c806-4a8d-975c-47570bf0e46d/68930563628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9be377c-060e-45f1-97c6-aa626178c72f/11168269329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f49ab61-d60e-4614-a781-d28774979225/77940429510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901f1963-94e8-4583-8ba6-c1e536edca7d/safe_t_alert_35-742.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/73405202593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa2f345-3e08-4ffa-b3df-dd939b116634/xugikajipikijujujimafebeb.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_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 5204 bytes
SHA-256: 93b469733dc2220633ee584854b8e57469692eb0809e098651b6b08063899727
font_01_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 12444 bytes
SHA-256: 58e119289d7457377eb3682c78f864c208104cdc8164589d7f814bfefc77f3db

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