Malicious PDF — malware analysis report

Static analysis result for SHA-256 54833aa91b4cd088…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 18:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4201eb512a04a97116140ec3d07768d6 SHA-1: b8b44df1d92c1d1a9e243a3c7d686d0b9993e47d SHA-256: 54833aa91b4cd08898ad8ed6ebef735eaeb5ceba918ac2b7cf82af2c8e54b91b
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 URL is likely used to lure victims into a phishing scheme or download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=rdr2+mary+beth+fountain+pen+location In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5f9d0ff3826c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489033/normal_5fb4e16f1268c.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/69189a72-1f1c-494b-b8e1-b6e861055629/r22_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb194ca8-e0f9-4773-b5bd-1e9bbdd761d2/las_verdades_de_miguel_710.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/85247228970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6015771-bca6-4e25-be06-9bef9a72d7ec/install_mod_apk_on_nox.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/88639487399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ea9268-f8df-42d6-ac51-1bb21415d645/change_260_kg_to_lbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd643c5-1ee4-443f-9271-a15786e5d47a/underwood_master_typewriter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/6306522459.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/tamil_amman_film_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b809ea72-0466-4866-923a-80a48f3ebaa0/71101018700.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_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 5600 bytes
SHA-256: 183f2e372a4dee14f33a898ba8582b031156eacde79c22b0fdb92c6b45439cb1
font_01_sfnt_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 9740 bytes
SHA-256: 11a826c87816529c6468612f3c76d21ddcf62bf7147fa9facf6d1803bca4a560

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