Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b12c7a46684cae…

MALICIOUS

PDF

37.6 KB Created: 2020-08-10 23:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a56822d50d31f7848be7ee09178305f7 SHA-1: 16a9139a490948a558151e684a5f727460350c6e SHA-256: 30b12c7a46684cae0df0a7da11bcc9fb78c7b29f9384ad28bbd05238a79efe24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely used for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=quest%25C3%25B5es+de+administra%25C3%25A7%25C3%25A3o+p%25C3%25BAblica+cespe+pdf In PDF document text
    • http://malak.andrekey.com/uploads/1/3/1/4/131482975/4638100.pdfIn PDF document text
    • http://files.boshamretreats.co.uk/uploads/1/3/2/6/132681156/wisudafiliposurejuxe.pdfIn PDF document text
    • http://befewaliz.richerdesignco.com/uploads/1/3/2/6/132682646/7275714.pdfIn PDF document text
    • http://files.michaeltsarion.com/uploads/1/3/1/4/131454523/6708263.pdfIn PDF document text
    • http://files.natalieeskewfitness.com/uploads/1/3/1/4/131438018/3692387.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/1/0428/9835/8432/files/49839171509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/tubibugese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/dipikunijozavupiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/27360855364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/etiologi_bronkitis_akut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/jasakad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/65507932429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/97943647523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/zasipodezuboroduwafelene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/blueprints_neurology_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5353/7685/files/cch_tch_trang_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/37697149835.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_off00004f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1A 6336 bytes
SHA-256: 2aa0dad8cabbc54aa8886aef136abd90d3236fff2c23b8f509f8b25bc3d22ed3
font_01_sfnt_off000062f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 11832 bytes
SHA-256: 1c25067c0f7f40b72b4deeba051cef901d1e3ebff16865804dd37bc6a9953ae9

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