Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dfd92f65035af3…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 05:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c649594186a2f686292c0af79c8d3cf1 SHA-1: 874fa938e3bc8b8fee53fef03d1153b589707f4d SHA-256: 12dfd92f65035af3983f8973aa5d6e3d9c258b1f0434b59bf726d38f382e095f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector and part of an SEO link farm. The document body, though malformed, contains text related to 'similar triangles theorem pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. 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=similar+triangles+theorem+pdf In PDF document text
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdfIn PDF document text
    • http://files.brookeboone.com/uploads/1/3/1/4/131452958/b96ef624.pdfIn PDF document text
    • http://bunodaxal.gelman308.com/uploads/1/3/1/8/131856772/sovatosa-fovolerozar-gaveba.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/1/0440/5189/0341/files/88121551005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/95035420881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5269/5703/files/gimegapebudarefuripibajow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/12997564967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/buell_blast_500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9918/4551/files/cardioversion_electrica_y_farmacologica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/jilodinofirusebak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/14028509020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/26604151213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/english_file_beginner_3rd_edition_teacher_s_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD7 5560 bytes
SHA-256: aa421dbff420e4fa56b7c2f3610095bbcb0dd7a184587f5c328b4b82c085336d
font_01_sfnt_off0000708e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 10804 bytes
SHA-256: 116105c19d7f8055c993abe3f0d1d89008faa258237b722e3ddda34470de08df
font_02_sfnt_off000095ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 16328 bytes
SHA-256: 6744bc5f1dd29617e11f6b95442a43dc4e42d6c979c2432f6483e38f708f0d76

Open this report in the interactive analyzer, or submit your own file for analysis.