Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e836955f090d16…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 01:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27f31e2572f948b535e703627feb1bbe SHA-1: c091960b328ddfaaf3714226eaf9c2063f1c1d05 SHA-256: 83e836955f090d16f3bd89de9125cb8e6a94afa17a67809378eaf5b3609cd9c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service that is known to host malicious content. The document body and heuristics indicate a lure for a PDF download, likely to phish for credentials or deliver a secondary payload. The ML classifier strongly supports the malicious verdict.

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=hierarchy+of+needs+by+maslow+pdf In PDF document text
    • http://dugadadew.nicolaulrichs.com/uploads/1/3/1/3/131381204/6d619.pdfIn PDF document text
    • http://rafozamu.nuevaconciencia.info/uploads/1/3/0/8/130874493/1408065.pdfIn PDF document text
    • http://jedogana.p2presources.com/uploads/1/3/1/6/131637309/4171606.pdfIn PDF document text
    • http://files.ferrielphotography.com/uploads/1/3/2/6/132695321/7521795.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/1/0436/3006/7865/files/39297105730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5266/0901/files/32218426255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5411/8550/files/cricket_3d_java_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/56137409439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1766/5701/files/botany_practical_for_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/fejexaxitujilorewijex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2420/2403/files/notepad_to_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/55163525412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/42300390055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/maxusefojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/78091027365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.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 2

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_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5688 bytes
SHA-256: 553c402227e7e732fdfb825ca84c0b3e52358d36b78f9f9100b18150db122afc
font_01_sfnt_off00007d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6D 10080 bytes
SHA-256: 07037b7c4f26305069845df00a9750c9baa309398e9310173387f1ce0a90e5ff

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