Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef353d87cda23e5…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 07:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71cbeb7ab1e1c37c6a12684f2c7cc6c2 SHA-1: 8bfe2690faa6fe181a10bd0413aad90519d0bcb2 SHA-256: 0ef353d87cda23e5df2f794fd0e53b5f9790f58bb2c3f0d8ed5f44b4bcaa8ad3
154 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, specifically pointing to 'https://ttraff.ru/pify?keyword=date+format+python+month+name'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify but point to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting an attempt to trick users into clicking through to a harmful site.

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.ru/pify?keyword=date+format+python+month+name
    • http://xuwemer.stevendupuisoil.com/uploads/1/3/2/7/132740873/4581898.pdf
    • http://files.romainewashington.com/uploads/1/3/1/8/131857193/ropodefi.pdf
    • http://files.kennelgoodidea.com/uploads/1/3/0/8/130814227/7322cf5cd1e.pdf
    • http://fizibade.salemfurniturerepair.com/uploads/1/3/1/4/131407995/badumukovere-gonitofivun-gawubiguroje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/nugibewagubolipapuzigifiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/10946483905.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/89984140505.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/29147868011.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/desinizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4527/files/lavabusuxabobojonive.pdf
    • https://cdn.shopify.com/s/files/1/0438/9293/2763/files/76418515211.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/vadibam.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/librecad_templates_a4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/clan_brujah.pdf
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/information_security.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006301.bin
d1b53e48d66669c888172023047300cd42b51738d490b4b4a1e7a5df26980868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 5032 bytes
font_01_sfnt_off0000740b.bin
c92c33f3fa697a5cc11f36dca2300fa4770b7876b2edb600df6dbd218924245b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 14296 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.