Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e7ad51e79bc955…

MALICIOUS

PDF

45.9 KB Created: 2020-09-08 04:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eccbf032a3c32f8997ba77fad001560 SHA-1: 6be27e2f10c8c2e0b545e23571f643920c76cbd3 SHA-256: 12e7ad51e79bc9553e6bc227fb4c0df80c5015d10531dccf67c312c9d19b3a1e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific redirector URL, https://ttraff.me/wix?keyword=iftar+invitation+template+psd+free, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=iftar+invitation+template+psd+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/89909165123.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/29623454151.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/data_structure_and_algorithmic_thinking_with_python_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/96620138367.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/academic_ielts_writing_task_1_sample_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_65935f0f44a7452cbeb395df8629532b.pdf
    • https://static.usrfiles.com/ugd/bba345_ccb90ec97908493f9482e3da8cc257ec.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_7064f649354a40fd93f1b83613d7a62f.pdf
    • https://static.usrfiles.com/ugd/b88e3d_ba4073a55a424387bb9830eaa6296c08.pdf
    • https://static.usrfiles.com/ugd/9b33c5_ec9aed3269a841d8a94149f1e22e5f80.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7056/files/weather_and_climate_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0463/5692/2529/files/addition_worksheets_4th_grade.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_off00005cb7.bin
4362476b801406fe4cf686678b086eff4a3d53a606d13e9a67798241c9ad62d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 5184 bytes
font_01_sfnt_off00006e4e.bin
24c90c92c93cd7b5d85a68ea3d636e6515622e503400dea974d3468b97b3d399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 10668 bytes
font_02_sfnt_off00009248.bin
182e984385d0a76de96f1526fc3eae95b1232d2dfba6e1d40899aa156d7ed05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9248 17040 bytes

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