Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e593710ff002c0a…

MALICIOUS

PDF

44.2 KB Created: 2020-09-03 21:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a4536b52d1ff86e2660380496d9eee SHA-1: 27308bbde0f45900f539c2dc0317ea0052d650c8 SHA-256: 5e593710ff002c0a38cec75e384d09fa3512e604581dbc0543973860d2488ab7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to obscure malicious destinations. One prominent link redirects to 'ttraff.link', a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'baby cot mattress fitted sheet' and a URL that appears to be part of a SEO link farm strategy, aiming to attract users through search engines before redirecting them to malicious content.

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.link/wix?keyword=baby+cot+mattress+fitted+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/9783/4918/files/vcruntime140._dll_wamp_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/4437061571.pdf
    • https://cdn.shopify.com/s/files/1/0449/8276/3679/files/fundamentals_of_electronics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/fejalijutixisenixib.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/abridged_prospectus_guidelines.pdf
    • https://static.usrfiles.com/ugd/b8c837_79cc6e811873480ca61b1ff00357a0c7.pdf
    • https://static.usrfiles.com/ugd/dcfb95_421176533812499389b78e71a23bbcce.pdf
    • https://static.usrfiles.com/ugd/5262df_d06955501d0f48e19275d1466e5befb7.pdf
    • https://static.usrfiles.com/ugd/97368a_8b0d3ac2b255426696064c812a104c0f.pdf
    • https://static.usrfiles.com/ugd/eda9ba_5006a11ab4e64699875e72a77e8bc413.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/35815080780.pdf
    • https://cdn.shopify.com/s/files/1/0463/6003/5483/files/multiplying_decimals_worksheets_year_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/77389876343.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/80156020879.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/powershell_get-_adcomputer_lastlogondate_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/2093/3528/files/12705552226.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/hair_cutting_style_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/vawufa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/add_transparent_png_to.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_off00006cda.bin
ccbffc403fbc956233ae85814c192899aa4fbd8ded0b72b8939f531eb250a112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 5520 bytes
font_01_sfnt_off00007f7c.bin
071983bff416e1c90006a75b49b1093de2ee2e7ba4e461d03295797959759a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10532 bytes

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