Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea7a5b54e6d2e8d…

MALICIOUS

PDF

42.8 KB Created: 2020-09-30 05:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b4d00a6396465af4d43d0c4d59cbbfd4 SHA-1: 7a18438c0298384d0a4e84126905ceba13f35c41 SHA-256: dea7a5b54e6d2e8d9fdf13814631e6578436980404839b6f2b6135129957425e
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body contains numerous embedded URLs, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful sites, possibly for SEO spam or credential harvesting.

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/strik?keyword=water+hygiene+and+sanitation+pdf In PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/94214671110.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/puwipo.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/mukidiri.pdfIn PDF document text
    • http://files.diamondjgantt.com/uploads/1/3/1/4/131407106/ac6e16184.pdfIn PDF document text
    • http://wafod.miniwanderers.co.uk/uploads/1/3/1/4/131407995/936be.pdfIn PDF document text
    • http://toxifeb.mr-nash.net/uploads/1/3/1/3/131380005/zivoleke.pdfIn PDF document text
    • http://files.camppepper.com/uploads/1/3/2/3/132302913/1217584.pdfIn PDF document text
    • http://files.buildingblocksplaycenter.com/uploads/1/3/2/6/132682124/5432468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/guvonupemijotelemodugubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8206/7357/files/time_set_minecraft_night.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/28948247134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3540/5721/files/86608504953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/50758897955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/duwemafujarej.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_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5384 bytes
SHA-256: 7cba76ef4564bba50173173e8e589c0418553828ecb48cf7aae087b7df269e77
font_01_sfnt_off000077e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E1 11460 bytes
SHA-256: f7a4a6916aa594ebe96ccf4faaf437c30727fa4f40fdd6c87fdd2e714c120dfc

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