Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b67069d5651d8a…

MALICIOUS

PDF

44.5 KB Created: 2020-11-03 16:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3ff379c74c477a669b7cfd9de18427f SHA-1: e3f8d0dc0817fbd2a1ae47c9202b8b0b7804731c SHA-256: d9b67069d5651d8a9717ba7b677d23bd096acbad7a6eda9448c8fc191103b161
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/123?keyword=list+of+hotmail+email+addresses', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to email addresses and a URL, suggesting a lure to redirect users to malicious infrastructure. This pattern is consistent with phishing attempts aimed at financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/123?keyword=list+of+hotmail+email+addresses In PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/mefunam.pdfIn PDF document text
    • https://xiliwawegumokap.weebly.com/uploads/1/3/4/0/134096460/tizowejipalov_negani_gavefetujokolo_tamoripujakuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f9a2fe7f12c6.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/2642412.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/9049441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f9c5b068152a.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/6427063.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/4530131.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/0d342ea4-b805-462a-a1bf-9e48dbf27ba0/lewomazuvoregogapokejavu.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/zufosi.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/70592450981.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/crestwood_movie_theatre_fandango.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_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 5088 bytes
SHA-256: f05cafac566b66983998affda71c90cb85e89e765b9975e2de6bc5e911ed4652
font_01_sfnt_off00008120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 10496 bytes
SHA-256: 05f52d89a23ff90424bb71c9d6108d78674db393bac10fd463983bc0c8d24242

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