Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebd30de9e50068a…

MALICIOUS

PDF

63.4 KB Created: 2020-08-16 19:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199970c794dfc9d28eefbba5fe2bd9e4 SHA-1: 8185b8e960a34a28f1bdadd47b7148161daed0fb SHA-256: 1ebd30de9e50068a0c8192a4995b8384ebae80fcd44adf077c8f0fe01a335a9a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=android+2d+game+tutorial+for+beginners', is likely intended to trick users into believing they are accessing game development resources, while actually leading them to malicious infrastructure.

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/pify?keyword=android+2d+game+tutorial+for+beginners
    • http://files.montclairathletics.net/uploads/1/3/1/3/131380717/zewadabedex-fojegojunozatif-lasavile.pdf
    • http://files.nashandcothreads.com/uploads/1/3/0/8/130813301/a8807bc684.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/vowepisenowaselarugipaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/9801975202.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/11972536542.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/ribenudaxurimilijeguramij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/20440893581.pdf
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/6192188070.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/11220580024.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/46596188189.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/82781068468.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/bible_quiz_questions_and_answers_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/10072401681.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_off0000ab0b.bin
b16b7c244bde3e1698607601416b471e5230b774a048b4a3e1cc3d4ea4009a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0B 5488 bytes
font_01_sfnt_off0000bd93.bin
143d174ccfb4467f2fb01ddf14d6de39ccc7f2e985b039168c27ed3b92f9f031
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD93 16336 bytes