Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7414afc640983f…

MALICIOUS

PDF

66.2 KB Created: 2020-09-01 05:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e41cb605d4994e335e58f4968edd04ad SHA-1: 04ecf1d809087f2a011a9dbd2d81bc57db9f1914 SHA-256: cd7414afc640983f541d34cb4345e53f03bff1f2d76af1c5ff6dc97f88233aee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'gymnast injury report'. This indicates a likely phishing or malware delivery attempt. The PDF also features a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier 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.cc/wix?keyword=gymnast+injury+report
    • https://static.usrfiles.com/ugd/8a419d_b3da7052e5a44762a44d653594fd3712.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_c327d91bccef4a74a81f8ac54e71ac24.pdf
    • https://static.usrfiles.com/ugd/9c43ec_1794c352a38b40a2be3d308b10cad429.pdf
    • https://static.usrfiles.com/ugd/73f3b0_b67b25939a8c4acdbf71fb206e72edbe.pdf
    • https://static.usrfiles.com/ugd/29c71c_4635183981b04cf4aecffb991d07e078.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/niobe_labs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/55107653818.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/3069794895.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/all_laboratory_equipment_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/bogoku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/welup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/guntersville_fishing_report_june_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/josilurajolokexilog.pdf
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/language_comprehension_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/nitro_8.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_off0000c782.bin
9618c047f1adba95fe0036cd1aac8632d3b346bf5ffecedc6e68686bd087ecbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC782 5140 bytes
font_01_sfnt_off0000d8f6.bin
885f5b68906fd5f874531b480fa51894a9cdd706104d660357bd28e598b69f7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 10288 bytes