Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a4b5fda3ebb28f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-22 20:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f4b381ba2823b7eeaf13753a366990e SHA-1: f7f4867d4da5dcdfea03d272b91539d94a6115c5 SHA-256: 08a4b5fda3ebb28f8e9c4b6037e6301ef52c4854974d9aa352dceaf7432520f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to redirect users to malicious content. The presence of numerous external PDF links, many pointing to benign Shopify URLs, indicates a link farm strategy, likely to obscure the malicious redirector.

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=imca+modified+setup+sheets
    • http://files.investmentcasting.org/uploads/1/3/1/4/131438228/gojinaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/96810209904.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/igcse_additional_mathematics_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9600/files/nursing_article_critique_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1013/files/nilugetutenazarojevofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/metallica_nothing_else_matters_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/22689445570.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/jojijoxulikin.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/r_alphabet_wallpaper_free.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_off00004b83.bin
ca2a6a8216c01296398647ce0eec0ca5e9a98ef0315b4de8c16a5ce037c62e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B83 5204 bytes
font_01_sfnt_off00005d10.bin
7dea386d546b0a21acdf731bf7e0fd48f78b748623893aa4107126553c357ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 10444 bytes

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