Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38a4d04b81daa1f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-14 20:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8fccfc4afabbdcb0ae5099ef5caea7b7 SHA-1: c949e1d85d9eab1add2ef7599ac1561599cbc58c SHA-256: f38a4d04b81daa1fef8685f47fff60821e8358847476279e9378986340ad8716
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body text and embedded URLs suggest a lure to download a PDF, which then redirects to malicious infrastructure. No scripts were extracted, limiting the analysis of further stages.

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=arguably+by+christopher+hitchens+pdf In PDF document text
    • http://files.westlakespeechdebate.com/uploads/1/3/1/4/131454024/bugegafijuwipepipa.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/1/0431/9327/0429/files/82275156549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/52902094501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/animals_drawing_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/nefokexutidokexosizobof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/83189461577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/15962452205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/47691347999.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 1

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_off000060b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 5648 bytes
SHA-256: 924f9c572b41d216f7e84a4306a359760cffc4d31a766010dba9988dfd425df4
font_01_sfnt_off000073e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 10120 bytes
SHA-256: e62ddd2720d618e307671e1f6e5393e4918877e580ee379450d963d1ee86f79b

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