Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead6174b6b88c7a1…

MALICIOUS

PDF

54.0 KB Created: 2020-08-21 03:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51c3f2e4af157ba42f8cadc10d88df0a SHA-1: 75c9edf79cc243ea9684c008cfa4ef309a9f5246 SHA-256: ead6174b6b88c7a1b75ade597d0f5fab583eb28d836683f5477f27fa19a6e052
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to SEO-optimized PDF hosting sites, which is indicative of a link farm or phishing campaign. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=aprender+a+leer+dehaene+pdf, suggesting the document is designed to lead 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.ru/pify?keyword=aprender+a+leer+dehaene+pdf In PDF document text
    • http://midisak.exoticlocations.net/uploads/1/3/2/6/132695471/bemejomonun_podew_wosekiwifiv_mefabo.pdfIn PDF document text
    • http://vofawad.bakersfielddressage.com/uploads/1/3/0/7/130738730/2109251.pdfIn PDF document text
    • http://files.flourishkiwi.com/uploads/1/3/1/4/131483097/5519565.pdfIn PDF document text
    • http://files.humannetworklabs.com/uploads/1/3/0/8/130814531/jafosivizotesidan.pdfIn PDF document text
    • http://files.conrah.wales/uploads/1/3/1/6/131606965/33ac2.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/1/0431/6109/2250/files/course_evaluation_form_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/62265966787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/akele_hum_akele_tum_video_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/bsf_video_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5836/3558/files/dimensions_guide_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/nagova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/bank_of_america_holidays_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1289/4374/files/nelson_mandela_speeches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/bethel_music_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/tugafanefevejowajatuf.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 4

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_off000083ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 6068 bytes
SHA-256: 5e53f6761faf80c41b2d6ededa5c9973a6b57758eb9746762cb503f8e4793396
font_01_sfnt_off00009886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 4940 bytes
SHA-256: d0e28ddbeddd72bd06c683f9b3aa96e1b8ac35cb10329ce0020f8765069ccf55
font_02_sfnt_off0000a943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA943 9724 bytes
SHA-256: 663008e98e49390564b638b4fa9741bc205f90ea474c6c0d37961c524460e8cc

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