Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4a030695ae6a5f…

MALICIOUS

PDF

51.1 KB Created: 2020-07-25 05:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85abf8f80b28dccffca1fb626c3e5ba1 SHA-1: 62d8ae932450b89e064798796a578a62671a2ae5 SHA-256: 9c4a030695ae6a5f1e04dc091399e2e77123c6dbb68f012d98e8f7cf55f7242e
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM. The document body, though heavily obfuscated, contains text related to 'second law of thermodynamics ppt', likely a lure to encourage clicks. The primary attack vector appears to be social engineering via a deceptive link.

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=second+law+of+thermodynamics+ppt In PDF document text
    • http://files.fonkgerdi.com/uploads/1/3/1/8/131856860/batak-fupibugural-xezijoli-zerosemoji.pdfIn PDF document text
    • http://files.kristinvanrisseghem.com/uploads/1/3/2/7/132740778/5774713.pdfIn PDF document text
    • http://files.bbcdpc.org/uploads/1/3/2/6/132696018/c776c.pdfIn PDF document text
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdfIn PDF document text
    • http://files.aerithe.com/uploads/1/3/0/9/130968968/c5a32629ee.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0433/4646/0840/files/dibufibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/rutipojavanusageguxenone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/55406591376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0739/3439/files/xozomokejunobuvugegaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/11223913326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/zifiwapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/41119493536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zumimulapowekulusevenire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/81826763070.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_off00008026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 1560 bytes
SHA-256: 3480c55784b56b30103e7ce104023669119397bb16b4866b09a90a8ad0bb0338
font_01_sfnt_off00008823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 5480 bytes
SHA-256: 73388f17e200dace73bbac97f68c118ba205cc16bbc55652e653d8c0c2d815b6
font_02_sfnt_off00009aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA0 10528 bytes
SHA-256: ebe978992994eeba91ca9aead7c953d5d7caeca3e016533d3dc03b0450297ebe

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