Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4af3b69e1ee743…

MALICIOUS

PDF

51.6 KB Created: 2020-08-13 18:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fe965408ee57839de64d1be69866cb1 SHA-1: a0815979d1e3ebe672cc703940ed7b7ca5c7e808 SHA-256: df4af3b69e1ee743e249d684ff058fa566b383b15c5ccfe26eeceb8e53478e2b
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary attack vector is to lure the user into clicking the link, leading to a malicious site.

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/wb?keyword=makalah%20budidaya%20kelapa%20sawit%20pdf In PDF document text
    • http://files.markmarinozzi.com/uploads/1/3/2/7/132740665/zasem.pdfIn PDF document text
    • http://files.photoartnm.com/uploads/1/3/0/9/130969003/67ee7.pdfIn PDF document text
    • http://vikava.esstucco.com/uploads/1/3/1/6/131636725/vejezomiw_nadunegemed_zigovoka.pdfIn PDF document text
    • http://xefaveku.earthjoysnacks.com/uploads/1/3/2/6/132680813/betemafunemud.pdfIn PDF document text
    • http://files.classicalballetofcalifornia.com/uploads/1/3/1/6/131637362/6392202.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/1/0437/1991/7717/files/wedaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/68394552009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/27795836402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/danizosijakiriwuzakiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5079/3110/files/zabajerunerepak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/wezepagak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/rarogufomimovixiwagepawuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/47967274700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/ferozawilopoxobuwone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/zafepirogumozule.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_off00008aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABA 5436 bytes
SHA-256: 3c999fa261408cb237113ce5d666447722b96d791e8531d69ad4ade63d877acd
font_01_sfnt_off00009d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4A 10616 bytes
SHA-256: 6fb438a00b9fd2a486ea2294dc914ba19ed98b93c777db334dff78d3c675d519

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