Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae49ebc8d4c1c57…

MALICIOUS

PDF

47.7 KB Created: 2020-10-08 14:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 654a18fe45079355969f23ca614a869e SHA-1: 9ea7e7ed2ada4e8e73f4e8ab999e0e4cc2fc3b18 SHA-256: 1ae49ebc8d4c1c57c4ca5635baa86a5401c4ea3c2b98769ab5432d5169ba431e
184 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics, including a critical finding of a link to known malicious redirector infrastructure. It also contains a large number of embedded links pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

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.
  • 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.
  • 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://ggtraff.ru/pify?keyword=rv+stove+cover+ideas In PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/79992159238.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/muzixifelubuzoruji.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/32182243352.pdfIn PDF document text
    • https://site-1043653.mozfiles.com/files/1043653/dateribob.pdfIn PDF document text
    • http://nitimemap.randygachet.com/uploads/1/3/1/3/131398244/a7be552dab.pdfIn PDF document text
    • http://files.nahomiichino.com/uploads/1/3/0/7/130738805/7662006.pdfIn PDF document text
    • http://viwewa.hisembracinglove.com/uploads/1/3/0/7/130776330/bujudenomogefojugax.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/d675ca9b-1d0d-4c46-8f96-3ec3c9ad13ce/xusawulemudokejufuzadux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25061547-762d-478b-946b-f1b74728f829/68111938108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ae93df-a997-4ae4-a540-0ea145dbfecd/21204760315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e90354-e3f3-4058-a974-7ce5ac39e3e7/21196420240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6bf9dc-88fe-4a58-ac82-0e5270188f4d/40588710310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f7de97-5d26-457e-8f78-8658985b33b7/27268380135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50744781-ff90-4ad8-83b0-1a6fdc6da46c/muleperusijozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85403d60-f140-4108-86a6-35db29a4f218/xasavatamoburezopud.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_off00007dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 4968 bytes
SHA-256: ee9cf28495694ca40928f48653ec7287d3566d5f041860de67f744d367672d70
font_01_sfnt_off00008ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 10240 bytes
SHA-256: 9078b69309451c32aa660171c76c805fde7e8a0b708058d2907e162cb1c33fef

Open this report in the interactive analyzer, or submit your own file for analysis.