Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66e3147defd457a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 02:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 806794090b1e9c645a3dd138be7e8512 SHA-1: 8cbf6b4e6ea45a474d84b000fc273a836f18d811 SHA-256: f66e3147defd457a45a41631d03e92f70e4ef1b744881bfe5a01dd3986c445b0
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. This suggests the primary purpose is to redirect users to malicious sites.

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/wb?keyword=talk%20about%20yourself%20in%20english%20pdf In PDF document text
    • http://files.mentorlylarye.com/uploads/1/3/2/7/132712326/kukatem.pdfIn PDF document text
    • http://files.veilliestarrcomics.com/uploads/1/3/2/7/132710565/8346750.pdfIn PDF document text
    • http://files.ravenhillbotanicals.com/uploads/1/3/0/8/130874400/6bf4325387c5f9.pdfIn PDF document text
    • http://dexejunub.magicalcelebrationsutah.com/uploads/1/3/0/7/130739615/xusonodijeniwisedag.pdfIn PDF document text
    • http://files.teambirths.com/uploads/1/3/0/7/130775002/tazabir.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/1/0431/8206/3777/files/tapigekevutipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/66644106030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/box_dieline_vector.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/bronze_horseman_pushkin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/kapeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/miloxazexarasez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/gekow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/articulo_de_opinion_sobre_la_tecnologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/us_flag_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/bibliology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/karitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/rutin.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
🗂 Part of campaign: teambirths.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 5560 bytes
SHA-256: c57e55541d49adee78bdf79e49e5a9a29082cec4ae73e55fdb5840c035042e59
font_01_sfnt_off00007660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 10060 bytes
SHA-256: 176db82ba07b59f5ee363baf45cbd3f9d513a029dcfcb2cea1201a1d30fe08a3