Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf7838823b312fd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 11:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8ba87e7b03c23ebefb9b4c111bd67c1 SHA-1: b208a6ea7a0a2ff07c89e407eae361a7827139af SHA-256: fcf7838823b312fd800afc60f7e88f93bda82f377878c546095b2dc6fd1dbe87
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a book title and the malicious URL, suggesting a lure to download content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent to redirect users.

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=web+application+architecture+principles+protocols+and+practices+3rd+edition+pdf In PDF document text
    • http://files.meggiebichard.com/uploads/1/3/1/1/131163540/4243766.pdfIn PDF document text
    • http://files.virtus.hu/uploads/1/3/1/4/131483318/f3e99454ae.pdfIn PDF document text
    • http://files.eddiebyun.com/uploads/1/3/1/4/131437216/4879382.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/1/0432/5621/7750/files/buforexunagasojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/39156898628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/19052376994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/sezopaxawamuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/tepituzevofademuladi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/jesaxifumojinuvufolila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/porikofoselofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/wuritetezup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/rawutazefenubeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/69420646827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/wenoset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/28938277212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/juzix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/jvc_everio_manual.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 7

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_off000071d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 5560 bytes
SHA-256: ced342e0c8d35db5c996fec8c8f24c2109bef47e2f31208c35717aa6c7b6c1dc
font_01_sfnt_off000084c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 10324 bytes
SHA-256: cb3f350e7b09e1cca17bb0197e20c5e7de9d059caa74ef02c8aa63c0e5ddf844

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