Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b2af8cf5c595b2…

MALICIOUS

PDF

70.2 KB Created: 2020-11-13 04:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 262a8bcc87eeb6d77d9604c073beb4a1 SHA-1: b821b8d8c94ca272db52c0ffc41a38680aa4e203 SHA-256: b9b2af8cf5c595b2b09f0a301737b97cc48a956065984a485c47d0eda5149cc8
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is malicious and uses an image lure to redirect users to an SEO redirector. The embedded URL 'https://traffset.ru/aws?utm_term=attu+movie+video+songs' is flagged as a high-risk indicator. The ML classifier strongly suggests maliciousness, and the document body, though heavily obfuscated, contains text related to 'Attu movie video songs', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?utm_term=attu+movie+video+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f97ecf00d161.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/gedaw_weban_dazuko_jukenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suximawo/29540510286.pdfIn PDF document text
    • https://s3.amazonaws.com/madegusulepugif/tewajetonufir.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/bokowunafineb.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/62836256864.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/language_handbook_answers_worksheet_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d451ac-5cdd-4514-b6a6-23f3f771a9d7/bezosat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7335e18-6c24-4014-9ff0-a572d36e45d1/2015_toyota_prius_v_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/yardman_yard_bug_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/34677760606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97207773-93c2-4633-9dbb-d7568c6bf857/mujezofuxevalubikititapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93de7589-e5b4-424f-aa09-f71e24167636/41634023094.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_off0000d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 4856 bytes
SHA-256: 28fb73251bf2e0b3af6132eb805e500b388a339786c5ded260ce14835904ed7d
font_01_sfnt_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 10912 bytes
SHA-256: 524cc4afb3f83f554ff295a7834201264e531d37d32220195723656e531d90b4