Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfae6565b7e4534…

MALICIOUS

PDF

41.7 KB Created: 2020-11-09 14:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 633beefb62e993c65a0dddb691df9d81 SHA-1: 1878cda95381ffd4b9e71423335c843f7fc47d3c SHA-256: 1dfae6565b7e4534a375609d16041993d84f945d1277494f869e8458bd17fa9f
116 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicative of a link farm, with one prominent URL being https://traffnew.ru/aws?keyword=bogus+basin+condos. The heuristic 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and embedded URLs point towards a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffnew.ru/aws?keyword=bogus+basin+condos PDF link annotation
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/67b14.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/mubefula/separation_anxiety_disorder_in_children.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2408d021-cebc-4f3d-8df2-9e48e94647b5/zelobugoziredinavijix.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/27381902086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bd9c14-5ae3-4758-a7ff-fd20422e493c/91805133484.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/21622755662.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/bachelor_s_grove_ghost_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84a7e31-63c3-4692-87b3-0336c8c64d96/kofotokujem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b1b432-8282-44f2-8073-c63605e4ad55/humanismo_psicologia_aportes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a080c6-2ae9-4df5-9d4d-d6c07096cb7a/fakotegosunofilukexemakuf.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/marudijikadovovizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d4e03c-0899-433b-b505-0d70b3adf946/fosaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cf9445-9523-4922-bdb3-fdc4019a07c8/tikugimibo.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_off0000646d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 5168 bytes
SHA-256: 1edffda508d34d232f5822543750bbafd9ee6fdd4c686707d42bf4efdc1e3231
font_01_sfnt_off00007618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 10764 bytes
SHA-256: dff65607864e9b4acf97858349188a21985a1d2c2bdce12e65714d519ea2114b

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