Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd411a8fd862a58…

MALICIOUS

PDF

65.4 KB Created: 2020-12-09 11:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 008b9f0ecc94f89ddfd7e4cdd1b81f96 SHA-1: b575c55a5ec9cd1ae416a467ef8399aaa6b6d616 SHA-256: cfd411a8fd862a5877b8dd3f100747708c606891ec4b30939d228d8d095fc0a2
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'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lure the user to a site that hosts phishing content or downloads further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=wild+horses+bishop+briggs In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/zujurivakiva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c8fa27a199023ac1a380/t/5fce21232fa8bc6bcd118a47/1607344419956/tetosaduziripijapuba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6562327a199023ada57b2/t/5fc97846c010ba21c342d6f4/1607039046525/star_wars_cast_episode_4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28ae3ec917750a3e23ff5/t/5fcbded2a51c5a1401b63b11/1607196372018/fresh_deals_finder_coupons_discount_sales_offers.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/sebosobinero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf197c7afe470b5555876/1606218135553/chemical_reactions_multiple_choice_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/tijukitaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55808156-e694-47da-8242-e4e975cefe25/gymboree_class_schedule_toco_hills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7302e7e-244a-43ea-98f9-7c1d4d48cec6/mitsubishi_turbocharger_td025_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e245f0d1-5228-48b7-8f08-3db4c71df80b/kiperuxolopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3130093-4dd0-4471-990f-ea8662c4ea53/33406497032.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc685a23c6ccf69f341cfba/1606845858794/free_brain_games_online_for_seniors.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf5eb0941bd0096f294613/t/5fcfe8024b348f0c1aff59cd/1607460866591/game_maker_studio_download_for_pc_32_bit.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_off0000c075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC075 5164 bytes
SHA-256: 283f92db05a00ad5ee11d29d8f599aeb3e60b5f360ab3ac7b94513b8606d8966
font_01_sfnt_off0000d204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD204 11928 bytes
SHA-256: cd7d203e74945127bc274e8406412bcc8d4409e9bbe627a2a1fad8de265fa441

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