Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b6d0ebc669ba79…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 22:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4d10f7910083d5503650a05864d0c3a SHA-1: 85f6924413ac87c200a43aa16d95676798205a72 SHA-256: 63b6d0ebc669ba79e3af1f82785f59b287a4ba5ede7e7c1a62e61154d05ba717
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a primary link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to a calendar and the redirector URL, suggesting a lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including to a redirector, supports a malicious intent.

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=calendar+september+2020+pdf In PDF document text
    • http://files.stjohnshemet.org/uploads/1/3/0/7/130775462/7e9401.pdfIn PDF document text
    • http://dumux.tylerroommakeovers.com/uploads/1/3/1/3/131398140/5ca06e2f32d.pdfIn PDF document text
    • http://files.ucsd-stahr.com/uploads/1/3/0/7/130775607/fanofusus-napodawerej-butadaberuga.pdfIn PDF document text
    • http://files.pendulumhealing.com/uploads/1/3/2/3/132302824/zelidunisipo-pebuw.pdfIn PDF document text
    • http://files.worldvision.com.sg/uploads/1/3/2/8/132816036/4526439.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/1/0432/8944/4510/files/zavowufinok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/12043861593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/fimegib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/57384883276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/87872922587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/79592002487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/dosas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/56884542862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/kitab_bajuri_jilid_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/dictionary_english_to_urdu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/kezulewafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.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 6

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_off00006dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5508 bytes
SHA-256: 66ea75b9a0fa5d857f4216d91a6bd05a7f2190570c3e38555bd1e19f5f00f12d
font_01_sfnt_off00008062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 10712 bytes
SHA-256: d052f78913461ac4dabc2c226ac7f590ad9f2111d6d5e0b84f8dd01f4f89dfa0

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