Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b5468937cbf4f7…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 07:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a2802501ce3bc9baac7b012fcda5500 SHA-1: df5a7594b04a6895b89d43a4fe74d62496d9c929 SHA-256: c8b5468937cbf4f7fa853bb9ad680997291f2169dc0e5bbab54717d2731c7c73
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/wb?keyword=reaction%20d'oxydo%20reduction%20cours%20pdf`. This indicates the document's primary purpose is to redirect users to potentially harmful sites. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent of driving traffic to external resources. 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/wb?keyword=reaction%20d In PDF document text
    • http://files.radiantearthling.com/uploads/1/3/0/7/130775529/2fa1596d0afa34c.pdfIn PDF document text
    • http://files.enterhisgatescamp.com/uploads/1/3/0/7/130740255/zujef.pdfIn PDF document text
    • http://jijedipa.stockdissector.com/uploads/1/3/1/6/131637814/senobezasija.pdfIn PDF document text
    • http://veteradix.simonegessler.com/uploads/1/3/0/9/130969465/9ed9d.pdfIn PDF document text
    • https://ttraff.com/wb?keyword=reaction%20d'oxydo%20reduction%20cours%20pdfIn 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/1/0428/3462/4679/files/6398773226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/12413523309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4168/files/history_of_buganda_kingdom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6370/4738/files/jiwokij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/rusevulozarunodarazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/alimentacion_saludable_vegetariana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/jafaves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/42302224717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8022/8768/files/xesazunimawowesepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/doom_3_absolute_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/alternate_segment_theorem_worksheet.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 3

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_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 5328 bytes
SHA-256: e8d5ac5b392a195dd035c143fc2b5adcc3743b2cba2118201a4b74faec80f478
font_01_sfnt_off00009827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9827 12656 bytes
SHA-256: 47784b6a5f6145db4bb381667ac14d7c6306e5e44d46e519bc6824ae68ed6fae

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