Malicious PDF — malware analysis report

Static analysis result for SHA-256 589d94d3cc288f8f…

MALICIOUS

PDF

65.2 KB Created: 2020-10-28 00:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9ae62d3609f40ad41b20cdcc2a54a99f SHA-1: 47972713aa4fe505b7104ef3ca820c6f8450ff8f SHA-256: 589d94d3cc288f8ff19c4e4740f46086f097d54d523dde5a79bb7d313dc9b06d
194 Risk Score

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.me/123?keyword=and+boom+goes+the+dynamite+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f8cb6261f7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f982611d9d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f951e7bad350.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c2ca.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c2ca.bin)
    • https://s3.amazonaws.com/fikuvine/ajcc_cancer_staging_manual_7th_edition_breast.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/hernia_inguinalis.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/gibirugirug.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/62071131666.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/3858688140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2615/6190/files/the_introvert_advantage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5307/0509/files/raxoremaperubugodenul.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/35724580660.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/12246504553.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/south_indian_actors_name_list_with_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/jodig.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/school_teaching_experience_certificate_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/mac_preview_form_font_size.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/september_2017_printable_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/difference_between_polysemy_and_homonymy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7754/0251/files/wedinigomadajapebezil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7589/5447/files/running_records_fountas_and_pinnell.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 extracted file (font_00_sfnt_off0000c2ca.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CA 5344 bytes
SHA-256: fac84e2495d625a475e6a583079a2c30f95032cae0c55e4b26864fb686f67e46
font_01_sfnt_off0000d4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CF 10056 bytes
SHA-256: b1454d2a355a47f96e79b6f61b87fd4af994de6600787235249af1f54e60cb5f