Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aabdb7ffd9d63eb…

MALICIOUS

PDF

68.9 KB Created: 2020-12-25 19:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 461caec91eb0fbd2382aaccd2d5f65e6 SHA-1: 812d2d0ebd92daaf5d16e2fc34c47fcd8ee2ec6e SHA-256: 9aabdb7ffd9d63ebed1d3b9f4f2c03a472ba794b022c2497f12008b45b3a0a62
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to redirector infrastructure, indicating a link farm or phishing attempt. The primary malicious URL identified is https://ggtraff.ru/strik, which is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=love+status+video+download+2020+sharechat In PDF document text
    • https://kijilijesudopob.weebly.com/uploads/1/3/0/7/130739968/e8a63cfa141eaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/xDgcRjg/93933985664.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/e9263ffa-a12f-4d1c-a5c2-9c992483ca74/1791684843.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/kavadisurudotivajufuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec70355d-69db-45a4-b2d5-30db0cb77687/two_dots_over_e_on_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d0674d-ed8d-4fce-bb64-fdd0100b9dd2/sosipubapokazemizizekedat.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/canada_food_guide_servings_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981e81e8-e48c-48b2-b539-f773aa0962dc/bupoputovojeliruk.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/26230959235.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/flipped_book_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8ea908-8272-4a8f-ae6e-e5c5a5c86b3f/43118464887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7804811-4de0-4b7e-a211-f970794d205a/sajogibetad.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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 5392 bytes
SHA-256: eb8c1290a8b7a70db2feaeab6c51f790fd699dbc284861561d192e1d3c446538
font_01_sfnt_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 9972 bytes
SHA-256: 5a342e61a15bca5bce96b952b4a63fd8ce99b4034453afcc957fb1525eff66c8

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