Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33bf46e2f817f7b…

MALICIOUS

PDF

49.1 KB Created: 2020-10-22 12:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da50e054006439570e929edca1f41654 SHA-1: 9042564a5d74582598064ae3cd48ea126242a63a SHA-256: f33bf46e2f817f7baedaaf839efb562be80a0da63278948590c525981fed786a
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the heuristic. This suggests the document's primary purpose is to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=all+about+me+english+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f89263e363ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f88281773a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_5f8f333962dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5f8fed551a44b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f872004e75c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f907445d4217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leguvefu/60863997422.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/batch_file_commands_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/76411568510.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/irrigation_system_design_an_engineering_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/15421869005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4279/0298/files/jikudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9512/8216/files/blood_in_blood_out_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4076/7641/files/merk_timbangan_badan_manual_yang_bagus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/basics_of_economics_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4622/7096/files/zinavejanufalukekuterab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9545/0534/files/jatatamaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4794b724-9256-4221-9d6d-d750c7df8e14/ripakawiwesosewakegovepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f0b1ab-e46b-4980-ab19-751c362716c1/40965579148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d39c16d-0468-467f-b298-407dbb29439f/xixiwudizadevafulak.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731D 5624 bytes
SHA-256: 7fd89558bd73099def653044a4c3cd34463fe3da68df78bd8b760b80393e3695
font_01_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 10164 bytes
SHA-256: 9e1c91567487f723d2ad433a81011833d02507e4e26f50c42e5330a1069369ba
font_02_sfnt_off0000a8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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