Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac20350f00cb3703…

MALICIOUS

PDF

54.2 KB Created: 2020-10-28 09:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d3d10d7b7d7746df63f21c6be6a4657 SHA-1: 769945b89e0d6be56021ace6a1b0aa787bbea868 SHA-256: ac20350f00cb3703e37e6af88de7dcae02fa3992533905b49f3ec52da0b0ab0e
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/123?keyword=the+power+of+deliberate+intent+pdf. The document body, though heavily obfuscated, contains this URL, suggesting a phishing or scam attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=the+power+of+deliberate+intent+pdf
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5f98753883f49.pdf
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f9177581ecaa.pdf
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86f8e4e7c31.pdf
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f960036ac7fc.pdf
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8d482abb3e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/77f78c3d-9db7-4793-b99a-4f1da29b1f29/setinuta.pdf
    • https://uploads.strikinglycdn.com/files/9cfd7f86-8f19-412e-bcb8-30582279bad8/aspects_in_astrology_sue_tompkins_pd.pdf
    • https://uploads.strikinglycdn.com/files/7602d073-aee4-4708-bd8e-e5c5ee2af6dc/disexixebemanazewenadaj.pdf
    • https://uploads.strikinglycdn.com/files/1b82807c-1e00-40d2-bffa-ef7afc8adce4/70842716973.pdf
    • https://cdn.shopify.com/s/files/1/0499/1634/6536/files/13934695027.pdf
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/19339774164.pdf
    • https://cdn.shopify.com/s/files/1/0485/0689/6539/files/debugging_with_fiddler_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/47761497006.pdf
    • https://cdn.shopify.com/s/files/1/0481/5378/8569/files/android_dialog_cancel_listener.pdf
    • https://uploads.strikinglycdn.com/files/ae96a0cc-b248-4b68-9cd1-7ac989adec5a/bojopexajufejuni.pdf
    • https://uploads.strikinglycdn.com/files/6204c308-3470-46e4-97bf-16566453cf58/zazeviwadikopojilaxax.pdf
    • https://s3.amazonaws.com/gupuso/analogy_for_ssc_chsl.pdf
    • https://s3.amazonaws.com/purixifusipelid/yasin_sharif_hindi.pdf
    • https://s3.amazonaws.com/jenisozazewubo/kosedilenevozepujo.pdf
    • https://s3.amazonaws.com/henghuili-files/lipebumemezizikeferenu.pdf
    • https://s3.amazonaws.com/henghuili-files2/samples_of_formal_application_letters.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000928c.bin
64bfb7f8ed8266581f57dde9c13059531852af38467ef543e20050fee0d4a5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x928C 5132 bytes
font_01_sfnt_off0000a409.bin
65cd3266c3574fad28bb7fb1a31dc72266de1d5837f9c338c1e48d61bb41b2f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA409 11752 bytes

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