Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bb316632a30643…

MALICIOUS

PDF

32.2 KB Created: 2020-10-30 12:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 83a8640bd2348fd279df68062a9527a2 SHA-1: 9d7142217a4ceed427f67457599b59ca9c9eb9f1 SHA-256: e3bb316632a30643ee1448d91fd1c712f045307d3311ce7285e9f127c3f06db0
94 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 indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/123?keyword=10+is+again' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://gettraff.ru/123?keyword=10+is+again In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8b2909431a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f9b7bbb737fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f8e239fbdf11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5f9335000925d.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/562208a5-ee5c-4d0a-af37-2471da1a561f/kedorugugofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5411b7d7-a5bd-49a8-a4b0-5e68c3147a8f/26130470256.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/jopoduxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0044bba3-8eb8-49e7-ba99-21e8666f8816/nuzurezuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10c7d7f-0769-4386-816d-bc293acb086c/6050976859.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/arthur_osborne_ramana_maharshi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5eb5f2a-8d6b-4a47-b52d-63f20d7614a6/pupebifanunigibekaxukel.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/rowe_ami_internet_jukebox_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d6d71b-e1a4-4a96-9703-f490829a3b0a/33856169360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7273c3da-1f79-43b3-85c8-62c7d9d182d9/avengers_age_of_ultron_telugu_mp4_download.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_off00004390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4390 4824 bytes
SHA-256: f23fbfccab0ca3aff0d33f84d133e60613292083e9c73f55f438dd40d2cfc96f
font_01_sfnt_off00005414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5414 9468 bytes
SHA-256: 6984696f94d3b05c7c40c75895c88f82dd50fceb29b02a87dac05e89c7589ad1

Open this report in the interactive analyzer, or submit your own file for analysis.