Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fde7890b2759fc…

MALICIOUS

PDF

54.1 KB Created: 2020-07-09 23:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: cf80aaa38cc0544ed505100aa6f2cc40 SHA-1: 8eeaa1340b7637f407017433dbb07b6e3a0d2b02 SHA-256: d8fde7890b2759fcf583fd5ade9c9308f8e59231beb282804953650acfb0a692
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to other PDF files hosted on disposable domains. One URL, https://ttraff.cc/wb?keyword=dom%20quixote%20em%20quadrinhos%20miguel%20de%20cervantes%20pdf, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, likely intended to drive traffic to malicious sites or distribute further malware. No scripts were extracted, but the presence of numerous external links and a malicious redirector 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://ttraff.cc/wb?keyword=dom%20quixote%20em%20quadrinhos%20miguel%20de%20cervantes%20pdf In PDF document text
    • http://files.busyboldlife.com/uploads/1/3/0/8/130814984/gazesaviwavera.pdfIn PDF document text
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdfIn PDF document text
    • http://files.putitbluntly.org/uploads/1/3/0/7/130740232/4218744.pdfIn PDF document text
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdfIn PDF document text
    • http://files.jrhewson.com/uploads/1/3/1/3/131398222/05a3d550.pdfIn PDF document text
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdfIn PDF document text
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdfIn PDF document text
    • http://files.queensboyzexplorers.com/uploads/1/3/1/3/131378816/7350eb.pdfIn PDF document text
    • http://files.handmadebylouisa.com/uploads/1/3/0/7/130775827/25f7f89e987e0.pdfIn PDF document text
    • http://files.saiseikarate.com/uploads/1/3/0/9/130969993/matusava-miradajasorug-petewajowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zowidunu.files.wordpress.com/2020/07/ramamudemiput.pdfIn PDF document text
    • https://gapilopuzo.files.wordpress.com/2020/06/49011562513.pdfIn PDF document text
    • https://musuzob.files.wordpress.com/2020/06/6353796977.pdfIn PDF document text
    • https://pijugelupuw.files.wordpress.com/2020/07/wujikanofena.pdfIn PDF document text
    • https://tufabusukas.files.wordpress.com/2020/06/papanafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 5704 bytes
SHA-256: db282e1818567b512386d658aaefbd80b72657410f3b51d74c96e303f1c53218
font_01_sfnt_off0000a3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F1 11484 bytes
SHA-256: 9311f4d2ad0be937baf3b810e31a8562dfc55109ca13d6e6f85c28441c87854c

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