Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff43ae9fd7cdb1e7…

MALICIOUS

PDF

37.6 KB Created: 2020-11-07 02:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 73614426b4b24b7ee7f946af75e076f7 SHA-1: 00a52aba0fa3cd554afe79a656c976ec8e272d62 SHA-256: ff43ae9fd7cdb1e71d41443c0aea2217abeec9f8f325393d33a77738e91b9971
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure at 'ggtraff.ru'. This indicates a likely attempt to direct users to malicious sites, potentially for phishing or malware delivery. The presence of many external PDF links suggests a link farm or SEO manipulation tactic to obscure the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://ggtraff.ru/123?keyword=trombone+slide+positions+flashcards In PDF document text
    • https://mizinunebij.weebly.com/uploads/1/3/4/6/134660950/5891995.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/9981170.pdfIn PDF document text
    • https://bovuvodesibos.weebly.com/uploads/1/3/4/3/134377535/rojibofaw_selaza_jetifizojupigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7a97f5-45f1-4603-8b1e-b2d855577db1/44840303425.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57f0d19-b36b-4eee-b860-f0551985cc59/kidotet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/68337733817.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/depalikizite.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/90507295533.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/nomenclatura_amidas.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/euphemia_code_geass.pdfIn PDF document text
    • https://papunovab.files.wordpress.com/2020/11/amlie_poulain_comptine_dun_autre_t_partition_piano_gratuite.pdfIn PDF document text
    • https://zopovamodutu.files.wordpress.com/2020/11/mifufavagatelajoru.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_off00005397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5397 5484 bytes
SHA-256: a1a3afbeae2b528188be44dee2809a6e3d0467bfdb4201645206248a90e87072
font_01_sfnt_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 10368 bytes
SHA-256: b52a46a65f7c49c673d02031053f9f4f76e17c959f3e546bf2800784f971569e

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