Malicious PDF — malware analysis report

Static analysis result for SHA-256 67625738477eb5c3…

MALICIOUS

PDF

153.7 KB Created: 2020-08-21 10:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49dcb77aa6195317053f0db68154283a SHA-1: f92b461d6277085fa881c1c8892b2f29c28d87ce SHA-256: 67625738477eb5c37e55948a4c546189dc29f7158a6fae5ae177fb7a72930335
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to trick the user into visiting a malicious site. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=watchmen+comic+english
    • http://kotija.acct301.ehabacademy.com/uploads/1/3/0/8/130813714/bupolo.pdf
    • http://files.jackofall3.com/uploads/1/3/2/6/132682585/lenibarepes.pdf
    • http://riliw.brushtailphotography.com/uploads/1/3/1/6/131606289/puvuziviw.pdf
    • http://files.winningtimefarm.com/uploads/1/3/1/3/131378990/9010879.pdf
    • http://sesivux.kingfisher-strategy.com/uploads/1/3/2/3/132302868/9874854.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/sickle_cell_anemia_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/telibepesenux.pdf
    • https://cdn.shopify.com/s/files/1/0444/4487/6966/files/amazon_web_services_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/naturumigir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/acca_f2_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/pdf_file_converter_100_kb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65621046881.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9600/files/53279330071.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/ms_sql_blind_injection_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/7328/8869/files/97693080120.pdf
    • https://cdn.shopify.com/s/files/1/0434/7599/2728/files/dnd_5e_form_fillable_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/dimifarofewapaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/customary_law_cases.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020623.bin
12deb6cd7e82750661602d0f3e602befb1109e6a99536140f5ac2236755c2049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20623 5128 bytes
font_01_sfnt_off00021784.bin
0a60e64c53b654c1244e56f2ea02e6e5c4a2a167ada2f4738b95466e4083c8e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21784 13924 bytes
font_02_sfnt_off0002440c.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2440C 16120 bytes

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