Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdfa4be69df397b…

MALICIOUS

PDF

71.4 KB Created: 2020-12-18 12:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b71a7daec5297bfed92ab7ec7a36b86e SHA-1: db4ee19850e38f89d42a99ade2a2dc47b18c157a SHA-256: 9bdfa4be69df397b69ab426699bf407f8f3184e419df66d86e50a1d92ea4d417
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/123?utm_term=answering+a+question+with+a+question+lying', is the primary indicator of malicious intent. No scripts were extracted, but the presence of a malicious URL strongly suggests an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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?utm_term=answering+a+question+with+a+question+lying 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/dapekufoxiraku/96732636694.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf575308845d0924817a97/1606375252509/spongebobs_pet_snail_name.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/berobuzigaziwedezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0f5100-4893-43c6-9fcd-06888ec166c3/kinh_c_thnh_micae_tng_lnh_thin_thn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4aa66c-76a2-4811-9eca-134e2d20114a/49653947382.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7904a778af068263f36d1/t/5fc88f01bbb7f45a928dbfa0/1606979329875/45925599709.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fcd836d9aa2de0c64ab2d14/1607304046107/the_lightning_thief_book_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e85117-7aa6-47cf-bb51-0649ab12f6f7/giletur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76158a33-2b29-4b59-8451-1c276b591c85/puvamip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648bdd09-fd36-40da-b1e7-e3c24f07c48c/romantic_good_night_images_free_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_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 5256 bytes
SHA-256: 1c8b09f80d78270efee01079ec6bcf75ad51077649415a6b86e5663d923ab520
font_01_sfnt_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 10968 bytes
SHA-256: 5b2ff21075ed5798bf12899d82330656071e178ea279e09daa259691b03ab805