Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8259030581519be…

MALICIOUS

PDF

32.0 KB Created: 2020-10-31 17:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 22c2d10b7c5178de6aab0704f2fccd6f SHA-1: 510cc10963ebe8060b25536794acb55f8b4737be SHA-256: a8259030581519be987d9686533674bcdc67a48192613eb2d21e675ad1346a23
152 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 specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of directing users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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/123?keyword=blue+coleus+plant+seeds In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f89d1d9b43b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5f973859b8192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f920ff8bd7f4.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f8d430af3887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5f8ff2d3248d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5f97dfba223fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f88a60897f6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/encyclopedic_dictionary_of_archaeology.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/list_of_states_and_their_capitals_of_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7841/0136/files/mipajetoseti.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 5020 bytes
SHA-256: 3e04b7f006a60608cbaffbf213f0c58f99fb9cf8c40e6c4f039e397095b523f5

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