Malicious PDF — malware analysis report

Static analysis result for SHA-256 41acdca390a68d96…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 01:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9fd5e67f453adf30b8338f6df864e157 SHA-1: 6f72e146d5bb97664e7f9a4a7d794a9e043df44a SHA-256: 41acdca390a68d962148709f7068bf7ba92b9b76785bdf485b569edd16dca4dc
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. One of the embedded URLs, https://ttraff.ru/pify?keyword=ukulele+tabs+somewhere+over+the+rainbow+pdf, is identified as a malicious redirector. The document body contains garbled text but also includes the same URL, suggesting it is the primary lure. The presence of numerous benign-looking Shopify links alongside the malicious one is a common tactic to obscure malicious intent.

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=ukulele+tabs+somewhere+over+the+rainbow+pdf In PDF document text
    • http://files.labradoodlesvermont.com/uploads/1/3/1/0/131070144/121d3d4.pdfIn PDF document text
    • http://files.vividconnections.co.uk/uploads/1/3/1/0/131070702/gabafojezejazom.pdfIn PDF document text
    • http://files.paulettesart.com/uploads/1/3/1/1/131164077/58eae48e0a.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/1/0432/4841/8973/files/application_letter_for_a_job_vacancy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/64986768089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3839/9902/files/nom_aditivos_alimentarios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/phil_of_the_future_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/unlock_reading_and_writing_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4299/4336/files/service_level_agreement_between_two_companies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2960/8101/files/nunofojafagapefibubik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/fly_ludovico_einaudi_sheet_music_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7213/4049/files/today_thina_thanthi_news_paper_tamil_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/agilent_34410a_manual.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_off00005988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 5628 bytes
SHA-256: f242e145532536346ec4b51b95896f59248f30e90891103af7e23ad3d60be827
font_01_sfnt_off00006c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C94 12932 bytes
SHA-256: 8c4bfeec818b664409910f501b957f2a36a2bf84088bb3cf5441bcb4bfbc37e3

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