Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6fe53bded2a230…

MALICIOUS

PDF

39.4 KB Created: 2020-08-29 11:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec102f08e1fc280599e0065e8f3fef84 SHA-1: 6d7cee5c17264373193769b221375cd9886627bc SHA-256: 5e6fe53bded2a23004556576e0926f4771e6db53134eb1d06d126190753ed486
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a potentially harmful site for a scam or phishing operation.

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=mrt580+new+balance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4d400c_45263808338d4731b0af0426dccbceda.pdf
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a603dc3220846d0981cb1715f1b9116.pdf
    • https://static.usrfiles.com/ugd/b8c837_f03b69e2e4bf4873b8fa71e4574ac44e.pdf
    • https://static.usrfiles.com/ugd/6c98bc_709d7705a7e641ce8fdf20f009c33a6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e60ee4fc6f5484e9be09e64f796be54.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09e7c95316f4fa48aca75a811768719.pdf
    • https://static.usrfiles.com/ugd/b8c837_043b03a4fe244744ae6adb5078defd7e.pdf
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/free_personal_financial_statement_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://static.usrfiles.com/ugd/b8c837_c941f5e74b2a4d34a5f1e6daefa38b9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fed169ac607041edb01b5777e1d865e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_06c2953bfe0242299008cf429c93311e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20a48ea922a4ea8b830a845bdf58f0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ab20aa27e6a4540a23c7558fa6d3eb8.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_off00005b80.bin
ac96fba3d7d1a309cd770cc1c8430c229657ed24106f7ef4297346bb06189dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5312 bytes
font_01_sfnt_off00006db7.bin
0a3c19118c68e2169e3d6d6e0d50a8b3a4ffe1c58656438122d18ca316b43008
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10376 bytes