Malicious PDF — malware analysis report

Static analysis result for SHA-256 478139f5f871c5e2…

MALICIOUS

PDF

41.1 KB Created: 2020-07-29 15:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 388adeae65a06b9e45d570b7d0f783f3 SHA-1: 30d483d4eaba2ba8798b594d3cfa21b18b982144 SHA-256: 478139f5f871c5e250505a4d40a4d6753afa68b3c598639800ebfa1a3ba3bdb7
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identifies this as a PDF SEO link farm, with many external PDF links. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is a redirector designed to obscure the final destination.

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.cc/pify?keyword=plant+and+animal+cell+worksheets+for+middle+school+pdf In PDF document text
    • http://files.moipu.com/uploads/1/3/1/8/131871553/zasisojowusejariril.pdfIn PDF document text
    • http://files.malcolm-morris.com/uploads/1/3/1/4/131438439/5196732.pdfIn PDF document text
    • http://files.practicalperspectives.com/uploads/1/3/0/8/130873893/a51c674.pdfIn PDF document text
    • http://files.echowynbordercollies.com/uploads/1/3/2/7/132740181/palivitapuvumu-vileb-mekog.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/1/0432/7908/9824/files/88651263018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/kalamaridiwerumatela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/gitiraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/92103719354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/tukaguvanedisemakagoginij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/divuserozolisuzerudunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/89983136809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6559/6321/files/retunixudole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.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 5

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_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 5340 bytes
SHA-256: 7a9f8062384f4458ed118d1e8a83087d965922faebf4657fcad51b87f3fb19f9
font_01_sfnt_off000073dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 10312 bytes
SHA-256: 6c95b43367e4b5842aba567ecfbaf9b5c30b5e3788bc8bfdf4ea3810cc431b0f

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