Malicious PDF — malware analysis report

Static analysis result for SHA-256 7515a663cd276098…

MALICIOUS

PDF

43.4 KB Created: 2020-11-09 09:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1fd0c8f4c2f8bd7a6e64155a87413002 SHA-1: 1f26774faded3be057bc1fa0088a696bed756963 SHA-256: 7515a663cd276098a75e03875021a5994b9a1561ed01953a1dbbc35997c60a5f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to malicious content or phishing pages.

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://traffmen.ru/123?keyword=light+pokemon+type In PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/71a7067cd1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5f942db6df26a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vedipepemani.files.wordpress.com/2020/11/antrenmanlarla_matematik_yeni_nesil.pdfIn PDF document text
    • https://kovipuwixo.files.wordpress.com/2020/11/19529240174.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c496748-19b3-4360-bd4d-114ec0a6429c/self_reliance_illustrated.pdfIn PDF document text
    • https://fozoned.files.wordpress.com/2020/11/47605673512.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://vedipepemani.files.wordpress.com/2020/11/27205235074.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/fedewisoduzoriki.pdfIn PDF document text
    • https://tigudizu.files.wordpress.com/2020/11/6620520308.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/23084658846.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_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 4824 bytes
SHA-256: fc7bfcf7520dbf2d94412a5a3487b842f504c8c0edb134caccb04ba29dc193f7
font_01_sfnt_off00007bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 11012 bytes
SHA-256: be46e4a45abcf2e45dc7c32b9e43a013626e0f2be638232d37678f57db0e837d

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