Malicious PDF — malware analysis report

Static analysis result for SHA-256 2540561246d1eb2f…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 23:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e9a3a31e1e2bee0315f6466202e8d55 SHA-1: cbf40170ff94c4f274d3d00fe81d836b570a9c54 SHA-256: 2540561246d1eb2fa073dadfb23a205a0f87300c33ee09d38a4603f5073a1a18
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure related to 'Amadeus reservation system pdf' to trick users into clicking the malicious link. The file also exhibits characteristics of a PDF SEO link farm, with numerous links pointing to various PDF files, likely to obscure the malicious redirector.

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=amadeus+reservation+system+pdf In PDF document text
    • http://bejekule.shoptaradise.com/uploads/1/3/1/4/131482995/zurud-nibojuxamubu.pdfIn PDF document text
    • http://files.iuppuci.com/uploads/1/3/1/4/131406300/680bb90523.pdfIn PDF document text
    • http://raxinifo.dietislab.org/uploads/1/3/0/8/130874422/netulakixepa-rerer-moposi-namogiv.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/1/0433/0687/7080/files/vakijuxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/30125765425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/zifamapewamin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/kazolobuzakagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/wemusudeguresazati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/aia_g701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/definition_of_absenteeism_in_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/easl_cirrhosis_guidelines_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/midalibiket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/easy_way_to_learn_guitar_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/scales_and_arpeggios_for_saxophone.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 2

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_off0000a376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA376 5304 bytes
SHA-256: 7b4e834043910d344f426fe3ee998066ee922a47ef38cc8160b4ba514aef182f
font_01_sfnt_off0000b574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB574 10376 bytes
SHA-256: fc1294f31d431b938e1094c644236a069373ad1986b38630ddd958f0a38483df

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