Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bce0ea5a535806…

MALICIOUS

PDF

240.7 KB Created: 2020-09-07 06:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d1db43f6537935286096ea8e15ad1dec SHA-1: 822f305d45ac7e286f8a9355658a2d4630a17041 SHA-256: e3bce0ea5a535806781dfba79b70cbf04ddb893edf8467fb2e4b2c3d5052efe5
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting urgency related to medical treatment, aligning with social engineering lures. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=new+guidelines+for+c+difficile+treatment In 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://static.usrfiles.com/ugd/760101_7c05530e1d53451eabb338a7a5e36668.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_98d4c87e7199497492d3de0fe3d8edc4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ccb1c6_bf45944c8cdb4746b4542b3bf7f8e771.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcf9ad_2c650a4c4f9b4c6295c82893044c6eca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/suzulovagiwiponidumos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/cantilnes_en_gele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/zadanedorusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7914/7430/files/what_is_a_good_spreadsheet_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/writing_a_book_in_microsoft_word_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/best_of_arijit_singh_mp3_free_download_zip_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/zubeen_garg_assamese_song_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/6450340281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/azoospermia_definicion.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C4D 5284 bytes
SHA-256: 4399e16defba117df02a51922ea59855fde11276191e765567cb813208da0f40
font_01_sfnt_off00035e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E39 15888 bytes
SHA-256: 62bae2d012ea4872c2b5a30a00b3df62d87086668b028f628ad89c5af854c4f9
font_02_sfnt_off00038f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38F81 16488 bytes
SHA-256: 0c9910b1bb6c7a2c572248ba640da6937881a27b695f83b288b35cd490104a12
font_03_sfnt_off0003a52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A52A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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