Malicious PDF — malware analysis report

Static analysis result for SHA-256 818c5ffd60c8f565…

MALICIOUS

PDF

40.5 KB Created: 2020-09-16 16:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19423ab4bd929b04d2ebf64d6529de77 SHA-1: dfd2f8a976e4910e9c4fbc5081e0623f924f877d SHA-256: 818c5ffd60c8f565dfd333fb62e26c99226a8b17cc56c29576d7e3e147fb0cc8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'animal farm quotes' and the malicious URL itself. This suggests a social engineering lure to redirect the user to a malicious site. The presence of numerous benign Shopify links is likely a tactic to obscure the malicious one.

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.me/wix?keyword=examples+of+propaganda+in+animal+farm+quotes
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/anatomy_and_physiology_coloring_workbook_chapter_13.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/50659028027.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8307/files/addition_and_subtraction_of_decimals_word_problems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/zewupifezusevoreda.pdf
    • https://cdn.shopify.com/s/files/1/0439/2802/7304/files/80663203644.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/normas_da_abnt_2020_referencias_bibliograficas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/descriptive_text_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/malidiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/atmega32u4_datasheet_atmel.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/product_analyst_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/best_book_learn_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4743/files/nixegimep.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/the_abominable_bride_movie.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006121.bin
7e2d2098d31ef2f8768e85d66a82f3c680a89a0a43090d2795e965850bb01fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5512 bytes
font_01_sfnt_off000073c1.bin
b0ada94cd26ab7036995e38a39f4c25d8dfd90ca926f96b6d1193e76b982f5e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C1 9788 bytes