Malicious PDF — malware analysis report

Static analysis result for SHA-256 1887793f1ec43d96…

MALICIOUS

PDF

42.9 KB Created: 2020-08-02 09:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3fea1a2b64dc45c92b262e0e0676246 SHA-1: ae7aeec1dcfeea25e6dacdb6da087415b45ce2aa SHA-256: 1887793f1ec43d96fbb773583d8635e7e354b32b30b7fdab349a5e305a205da6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to appear as legitimate download sources, but the primary redirector URL is flagged as malicious. The document body and embedded links suggest a lure for free downloads, likely to distribute malware. The ML classifier strongly indicates maliciousness.

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=calculus+early+transcendentals+11th+edition+pdf+download In PDF document text
    • http://files.darrenmayner.com/uploads/1/3/0/7/130738825/5848629.pdfIn PDF document text
    • http://files.myreasonwhy.net/uploads/1/3/1/4/131453401/jidigubude.pdfIn PDF document text
    • http://files.urbancultureinstitute.org/uploads/1/3/1/4/131453850/tomeruvobe_jefurilojogiba_gazufofifiteri_bigajumobitivi.pdfIn PDF document text
    • http://files.vanambergrealty.com/uploads/1/3/1/8/131871699/6689477.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/1/0428/2312/3100/files/awolnation_i_am_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/tiwitetejadebepexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/37898667936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/7779759371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/rinonumogepoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/27145670275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2386/7805/files/namuwov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/77039026236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5754/files/bikulexonerotizunamotapap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/79666681979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/dubuxelatud.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 5

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_off0000685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 5392 bytes
SHA-256: dac26ef11e14f90cbc108c9da6543699b276f7d58ee6903cec5e2a5139594f09
font_01_sfnt_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10420 bytes
SHA-256: ced411ec7d0d45e72ad32c06ef9249113c4f61691b0b4949cd8a275af626a687

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