Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d2213233f86bb5…

MALICIOUS

PDF

49.0 KB Created: 2020-09-04 21:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4ac2a262aa07f16be6906d52966142 SHA-1: 49ad7621d9fbd11405b95389d23b4d5a23ab1175 SHA-256: 05d2213233f86bb55e621b087a6f220aade6c303b41e7d672f28aca2966f1f40
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a redirector URL, suggesting it is designed to lead users to external malicious content. The document body, though heavily obfuscated, contains the text 'Math aptitude test sample questions and answers' and the malicious URL, indicating a lure to trick users into clicking. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or redirection attack.

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=math+aptitude+test+sample+questions+and+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0437/3967/6821/files/179345249.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/85131965368.pdf
    • https://cdn.shopify.com/s/files/1/0457/0673/9868/files/odisha_gana_video_ing.pdf
    • https://static.usrfiles.com/ugd/c618e9_04e8c25e7cb84a16a82024875991fd11.pdf
    • https://static.usrfiles.com/ugd/964009_7b80610d2bab4f5ea020dd9296a2280e.pdf
    • https://static.usrfiles.com/ugd/a64c8c_d04beaa5d899438a876e05dda6e203d2.pdf
    • https://static.usrfiles.com/ugd/c5d40f_1624923568a44055bca1771ade81bf52.pdf
    • https://static.usrfiles.com/ugd/6846fe_5e7e6b8aa7b54088a520690ba8eef45d.pdf
    • https://cdn.shopify.com/s/files/1/0459/6996/5216/files/v_p_l_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6898/files/90650324985.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/tibonedutasataxe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/eviriyle_ren.pdf
    • https://static.usrfiles.com/ugd/aa14a9_ab8f4135700b408cb1f2c6ec991efc2c.pdf
    • https://static.usrfiles.com/ugd/122077_88c746e57f504e52b5fb514599291ea6.pdf
    • https://static.usrfiles.com/ugd/136d3d_742ce040bbd04819b8c8a5a9353436ff.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_off000074e6.bin
867b66c3d8abb7a968cb89499253f1daed7c9826be8d33394f385789aab26639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 5424 bytes
font_01_sfnt_off00008744.bin
3e3da402d7cc1523dc182bdec8662c43a494dac8ea35d82d54392cbd856c04eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 15120 bytes

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