Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe78f3efb5528400…

MALICIOUS

PDF

81.1 KB Created: 2020-07-31 03:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00af7e90ab8f696113345f67a16ac77c SHA-1: dc6678062bde67fdb65a25569aa1824c2cf719fc SHA-256: fe78f3efb55284007090aa97216c1345492b0027041ca653db876966c77675a6
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its use of a link farm, which directs users to a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure for downloading a book, likely a social engineering tactic to drive traffic to malicious sites. The primary IOC is the redirector URL, which is part of a known malicious infrastructure.

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.ru/pify?keyword=cahills+vs+vespers+book+4+pdf+free+download In PDF document text
    • http://files.kobanuniverse.net/uploads/1/3/0/8/130814157/7765113.pdfIn PDF document text
    • http://files.heywoodracing.com/uploads/1/3/0/8/130814209/fisekonawefifuvoke.pdfIn PDF document text
    • http://files.corsettiparalegal.com/uploads/1/3/1/8/131857419/b1385f01279c40e.pdfIn PDF document text
    • http://files.marketmovesmatt.com/uploads/1/3/1/4/131438784/tizukir_fovizesuvirediv.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/1/0428/2168/1315/files/kuwujamuxakopokonubopewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/fosagezarebanisiladukuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/mitubotozemajage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/jezuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/38105080031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/75887564082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/53207297829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/sorumapifasomagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/jetomij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/wujanefipemupir.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
🗂 Part of campaign: billmitchellcreative.com 4 samples

Related samples 8

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_off00010056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 5304 bytes
SHA-256: b02500e81a95dbda171c86683d56cbe9b816483bc6d6934432d2c79604664d4b
font_01_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 10512 bytes
SHA-256: e0cd6b4947c0e74e563a77562295b287db6067b6298ea6502c351f276e2478a3

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