Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b47d885be07d19a…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 08:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b5c4de595935b3849a1b94acf248a3a SHA-1: 85e3279a29f97fadacbcf9e3a030ea7dae1dee19 SHA-256: 4b47d885be07d19a28eb0338dae21c63ce5d99b7832b4b37a733f8b332d9167d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to a redirector URL, identified as malicious. The document body, though obfuscated, includes the same redirector URL and appears to be a lure for free downloads, likely to distribute malware or conduct phishing. The presence of numerous PDF links further suggests an attempt to manipulate search engine results for malicious purposes.

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.com/pify?keyword=sakeplan+voorbeeld+vir+graad+7+pdf In PDF document text
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdfIn PDF document text
    • http://files.wildflowerrunner.com/uploads/1/3/1/3/131381919/1889a12.pdfIn PDF document text
    • http://bazis.betheone.co/uploads/1/3/0/8/130874254/6089435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/how_to_reduce_file_size_mac_acrobat_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/35467939648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/49757047145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/42178703984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/mugekavalaxufuvetukifuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/keboretunufuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0950/7487/files/14451364577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/77289078024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2001/6024/files/43382620604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/81801572498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/jinuninukitopuzisik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 5188 bytes
SHA-256: ed4b5684a067f6291673ddcdf5f0f23f233443a4282f93c551c1914ccd9d6d59
font_01_sfnt_off000084c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C5 10244 bytes
SHA-256: 3e727581ceb055d8de733c60e5d69e9c2af14e4b2c3d7cb09bafe06331c55b62
font_02_sfnt_off0000a754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA754 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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