Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1dadf82bdfb3a27…

MALICIOUS

PDF

44.2 KB Created: 2020-10-04 15:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: da0506ce72d1926fc1ab6732f4d65a40 SHA-1: 07ac7057b1eb128e1689361d6d80e47579541f7d SHA-256: a1dadf82bdfb3a2725b4e5898d7c47e61700be314b84137c5f03e458403f9a47
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document's structure and link farm characteristics suggest it is designed to manipulate search engine results or redirect users to malicious content, potentially for phishing or malware distribution. No scripts were extracted, but the presence of numerous suspicious URLs indicates a high likelihood of malicious intent.

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/strik?keyword=%25D1%2588%25D0%25B5%25D0%25B9%25D0%25B4%25D0%25B5%25D1%2580%25D1%258B+%25D0%25B2%25D0%25B5%25D1%2580%25D1%2581%25D0%25B8%25D0%25B8+2+0+%25D0%25B4%25D0%25BB%25D1%258F+farming+simul In PDF document text
    • http://dozunajek.kira-marie-mccullough.com/uploads/1/3/1/4/131453558/kilabo.pdfIn PDF document text
    • http://pibumebi.youimaginewemake.com/uploads/1/3/1/4/131407537/zosafepujujode-nadodemi.pdfIn PDF document text
    • http://tinumirel.arielmakesmedia.com/uploads/1/3/2/8/132814930/wajerekamam-fibolo-rogani-dumuwuxew.pdfIn PDF document text
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdfIn PDF document text
    • http://files.centaurscricket.com/uploads/1/3/1/0/131070379/f0c47e.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/64838323514.pdfIn PDF document text
    • https://site-1036881.mozfiles.com/files/1036881/27519381649.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/15971175154.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/1/0438/2382/5053/files/veinte_mil_leguas_de_viaje_submarino_sinopsis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/graco_snugride_snuglock_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5525/5204/files/gipekapijajujig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6826/3062/files/lowes_hardware_store_bangor_maine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4979/7790/files/48850395381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3076/0600/files/dodavem.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_off00005b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 6408 bytes
SHA-256: 1ebf12a86cd2065c28791b8e49c2497c07685b5a29c0553cb04a449a9eaf3e79
font_01_sfnt_off000070fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 15412 bytes
SHA-256: ce5ddd998b44d42cb506191a73af7544bb26136d15afcdbab3f722557d99fd71

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