Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb4ad2b3b587853…

MALICIOUS

PDF

49.7 KB Created: 2020-08-17 01:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f63180d20a2439361b5b91dc8f846f63 SHA-1: de27d1135b509f8cc28cb9977cfba1e7631aedef SHA-256: 0cb4ad2b3b587853a92b817a0674d80f49f46f1754bcb9a248b0037fa5d5f798
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious content. One of the primary links directs to a known malicious redirector, indicating a probable attempt to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=anaconda+2+movie+mp4+free
    • http://rezimix.ndinternationalpageants.org/uploads/1/3/1/3/131384244/sefasit-juxumubitimeba-rojovinut-penowakukisine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/faferuxotumaxamuwoporive.pdf
    • https://cdn.shopify.com/s/files/1/0434/2317/0710/files/deviantart_custom_box_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/57524455220.pdf
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/detepuzevemusimeserefaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/cacti_and_succulents.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/xakugorimudegusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/performance_review_questions_and_answers_for_employees.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/retagozegelasomalesor.pdf
    • https://cdn.shopify.com/s/files/1/0448/1590/9026/files/false_cognates_english_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/28862959967.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/dugezepas.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_off00006522.bin
92aae33597ec3939105b7529ed72ebfb20772388179b77a09d2e80e60919168c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 5360 bytes
font_01_sfnt_off0000774b.bin
c3f629f62fc6425351f74984509944b92b0eebd36c491c09a2c5a355208960b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 10320 bytes
font_02_sfnt_off00009ae0.bin
1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 18776 bytes

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