Malicious PDF — malware analysis report

Static analysis result for SHA-256 304361a0012a9016…

MALICIOUS

PDF

36.2 KB Created: 2020-11-03 13:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb979cede2a8d64916fa54f5ed5b327b SHA-1: e89579e5c0486d82de99fbcb52126da6417c0e3a SHA-256: 304361a0012a9016430ed667a38ee1d2c43d09305168ee17276bd0f2f82cc860
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One of the primary URLs, https://cctraff.ru/wb?keyword=the%20essentials%20of%20risk%20management%20crouhy, is flagged as malicious. The document body itself is heavily obfuscated but contains some of these URLs, suggesting the document's purpose is to lure users to malicious sites. No scripts were extracted, but the PDF structure and link farm nature strongly indicate 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://cctraff.ru/wb?keyword=the%20essentials%20of%20risk%20management%20crouhy In PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9333405.pdfIn PDF document text
    • https://mitegasur.weebly.com/uploads/1/3/1/8/131871816/634376.pdfIn PDF document text
    • https://jilibawijoza.weebly.com/uploads/1/3/4/3/134363321/pulogefise-begenebugo-lexetakinuk.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/semisej.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/240186.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/mitujefototoded.pdfIn PDF document text
    • https://nowakepofor.weebly.com/uploads/1/3/4/3/134369235/vovovamedatafa-vogujadu-mediso.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/mipuzabif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f88c475d6950.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/1/0504/0947/2188/files/88886543311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64d9ac0-d37f-4153-97e5-fe25362fe175/47867500306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57e8a97-d869-48b3-8d1a-9cb1f7aa6f27/vodilefapunamikesulow.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_off00004e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E15 5408 bytes
SHA-256: ce68ec91274c7b0f90f1a29f358b5ffb6b98ab0e5c1c0e7a3169901d0961b605
font_01_sfnt_off0000605f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 10660 bytes
SHA-256: 5c50aca8af1d95a42429a24d39f0b7065b723171aac8ddeb7d4d3599f72cc71f

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