Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55762f50edcb9a4…

MALICIOUS

PDF

48.6 KB Created: 2020-08-10 17:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 55989d29044581ce45b8a6316bb84cba SHA-1: c094f020d06d3fe417b6b0c05f2d363bbe040376 SHA-256: f55762f50edcb9a499f0335ff02828ae315fe85777071af1aee6f48484a50285
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate document downloads, but one of the primary links redirects to known malicious infrastructure. The embedded URLs and the document body content, though heavily obfuscated, point towards a lure for users seeking academic papers, which is a common tactic for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=balance+of+power+theory+in+international+relations+pdf In PDF document text
    • http://files.ntspruikle.com/uploads/1/3/1/3/131380591/678d88743e347ea.pdfIn PDF document text
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/8/131871419/didesivuruloliz.pdfIn PDF document text
    • http://files.dreamweaverscollective.com/uploads/1/3/1/0/131071252/kimodafopemusaz_vatozefiru_pubibe_fikidavet.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/1/0428/9350/8771/files/19697180718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5047/5413/files/lecture_notes_on_leadership_styles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/basic_computer_fundamentals_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/photography_iso_aperture_shutter_speed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/zevixoruvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/20582454124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/boundedness_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/38847389704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/paragon_mod_destiny_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/29318578767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/kakotajobizamiw.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 3

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_off00007eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 5484 bytes
SHA-256: 353a681c2fed1d7b3574633a39821cd3eb174c0d236f7d0fee271b7bb0ef5b79
font_01_sfnt_off0000919c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919C 10396 bytes
SHA-256: 8de7a4f7b693a1d73410dcf491ad01b5c99481bb3e2b9f33231a107f3c98760c

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