Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e629d76f4ccb31…

MALICIOUS

PDF

62.7 KB Created: 2020-08-13 04:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0baad55b845c998acf4c4a2e90198803 SHA-1: 77f6b99d885457a19edf2c51b1723c5855e9dc6a SHA-256: b8e629d76f4ccb31182cbd0c8678397f0b8a177558af594000d540646a17b6ef
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model as malicious and contains a large number of embedded links. One of these links, https://ttraff.com/pify?keyword=interpretacion+clinica+de+la+biometria+hematica+completa+pdf, points to a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a strategy to lure users to external, potentially malicious, content.

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.com/pify?keyword=interpretacion+clinica+de+la+biometria+hematica+completa+pdf In PDF document text
    • http://files.kulmschool.com/uploads/1/3/1/6/131606011/sazog-mafaso-larur-lilizubed.pdfIn PDF document text
    • http://wirekite.uluwatustudio.com/uploads/1/3/2/7/132740541/741422.pdfIn PDF document text
    • http://files.laceyandalexwed.com/uploads/1/3/2/7/132710697/415e4b2703.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0447/9831/2609/files/86678106376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/9063472697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/king_cutter_bush_hogs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/26745420586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/limomigamate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9148/5091/files/betabakodijajepixugib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0327/files/bajama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/6892569013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/the_5th_wave_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/carbazole_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/biligifexikirazipiwiwam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF9 1868 bytes
SHA-256: 12b1633e74a686cc09e457c6c71aaa1a447da6676619fc06e7ffa0f1dc70d9a7
font_01_sfnt_off0000a3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FE 5296 bytes
SHA-256: 873c05edb9069431fc38316dedbf3da0ec8492bff4105f6ccafe89cb35021d34
font_02_sfnt_off0000b5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BD 18004 bytes
SHA-256: 8fa172f11fd6e02bafbad438b896a468a5f9e7ca501bb79b1b5680fda81ca93f

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