Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f525ba04fdffe60…

MALICIOUS

PDF

52.1 KB Created: 2020-08-29 23:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 064d71ba41a083ca2f4967e195139670 SHA-1: c79fd7bb91d688a3f68e70dc8569a3b08d8beb96 SHA-256: 7f525ba04fdffe6002ae340b90811fc05a595916f9f3591236eef53a79da1374
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 document body, though heavily obfuscated, contains text related to 'Witcher 3' and a URL that appears to be part of a link farm designed to attract traffic. The presence of many external PDF links suggests an attempt to distribute or redirect to further 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.com/wix?keyword=witcher+3+free+vigi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c16e7e82a8a5471ca89954a7bc6e9b93.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f1b2fc291d84aa599e22554a97cf840.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb5198f9a05242d795593a5d9e023a19.pdf
    • https://static.usrfiles.com/ugd/eaf48f_4cc7f5daf1404dd5b7dd69eb98583ce9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657dfc8d9494d70855fa76bb9c1a0e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f08824529f9b4738bcc0c7db2681c5c1.pdf
    • https://static.usrfiles.com/ugd/b56239_e579379bc14c423bacb6b5f6715e62f9.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/ledabevenodumalozejudap.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7207/files/welelajat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufalelavajukunegaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/54743762401.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/java_code_snippet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/chemical_equation_balance_calculator.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_off00008f70.bin
628a88ff5d62f125ed6b0d4c8fde32830517c89e1f881082e0130201a1310b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 4960 bytes
font_01_sfnt_off0000a06c.bin
92e25648ed7130923718db8691acb6266086a9c70b569c8ba963b6271383b7f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA06C 10396 bytes