Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40e7e5e8f8c4af8…

MALICIOUS

PDF

42.3 KB Created: 2020-10-31 00:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 06a5f51b14274d93df194cc01cfe9999 SHA-1: e3d595995944f1f2d6000aad627d398058d0727e SHA-256: e40e7e5e8f8c4af82db5be14eef3f29098ddae3eb49f7fc3b5af0a1426c99069
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=asp.net+page+life+cycle+interview+questions+and+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.club/pify?keyword=asp.net+page+life+cycle+interview+questions+and+answers In PDF document text
    • https://kisogegexene.weebly.com/uploads/1/3/4/3/134374262/8047536.pdfIn PDF document text
    • https://gifedoku.weebly.com/uploads/1/3/4/2/134234788/xipisuruxudives.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/navuto.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/a9cccad8-db57-400e-a003-05b480fdd3bf/dagujeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7879851b-2583-4a13-860b-356debb64df5/zulafofidapoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecbe1c6b-1b6e-4224-9e7b-2b99cdea5633/ledabalese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c00a5b6-0a98-4f09-971b-483c604f47ec/11574776519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0ec7c9-b886-4688-84cb-634d3c3f3c83/feviwilekagawema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0831/7348/files/60300341725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e83c344-02e3-4c7e-9aed-698745d8c2ca/38822571252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8227/7572/files/send_bug_report_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920e94ad-a94f-48af-8ac7-e445ac2e58a0/37879288167.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_off000064d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 5724 bytes
SHA-256: 61bfcb427518b0ae21b0954a2cb797fb3b2efe3ed5db144c0434381c42e1bd66
font_01_sfnt_off0000787a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787A 10524 bytes
SHA-256: 23e8ee402b3755b9c0324a559995083a811876d521ff8a3a11afc60273f62522