Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c93ab09eb0828d…

MALICIOUS

PDF

35.5 KB Created: 2020-08-05 10:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3811d6e77a83d0c85574dd558c99be9 SHA-1: 6908c2a16c307ff4716ded99dd8b12ef7217a72d SHA-256: 53c93ab09eb0828db850a088364655a1414c0a475281bebe089cf60491b8680c
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including a known malicious redirector at https://ttraff.cc/pify?keyword=anemia+en+ni%25C3%25B1os+minsa+pdf. This indicates a social engineering attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=anemia+en+ni%25C3%25B1os+minsa+pdf In PDF document text
    • http://files.boundlessyogastudio.com/uploads/1/3/1/4/131437157/zuramefixivi_ruziwe_nivug_ximezepapinode.pdfIn PDF document text
    • http://files.adashofclass.com/uploads/1/3/1/6/131636677/245d61d958d.pdfIn PDF document text
    • http://files.peterlynas.com/uploads/1/3/0/7/130740097/3471294.pdfIn PDF document text
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.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/1/0429/2149/2643/files/uttararamacharita_bhavabhuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/25813230907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/95479466113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/13775336530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/physical_therapist_assistant_exam_review_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2199/9003/files/20331869316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/11416190363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/92688530151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/pirasolelopidalonidokojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/best_autoexec_for_csgo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/atomic_mass_of_first_30_elements_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/que_es_psicologia_gestalt.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 8

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_off00004aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEA 5260 bytes
SHA-256: 1171c9cd07245bddd6d104a0d51d80897c9e662a422a7b1fd1ee9127c8e7a3a6
font_01_sfnt_off00005c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 10892 bytes
SHA-256: e84b7d483edaf4ad2658578c439ed4eb36d05efd83b38ad5fe506ca34d5798a3

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