Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6b54a1b185b034…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 20:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af4018bd2ccc34b59a69d2e5fb23c031 SHA-1: 7c7b2ff9f8396349e2210d216ab19cc5b9c3c7cb SHA-256: ae6b54a1b185b03452823ef9f4ea17c12a352d7ab19436a50089c1c0cfd465c1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, disguised with a seemingly innocuous topic. The document body, though heavily obfuscated, contains the malicious URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=r%25C3%25A9soudre+un+rubik%2527+s+cube+4x4
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/winegipakukobamulob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/42655264881.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/rejitaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/xilirepomunanurajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7239/files/describing_graphs_of_functions_worksheet.pdf
    • https://static.usrfiles.com/ugd/60933b_2c56e14587f14d9b9b5bd15ae5bdfa76.pdf
    • https://static.usrfiles.com/ugd/b8c837_84d00b0aba554ca59aefe89adaa1aa86.pdf
    • https://static.usrfiles.com/ugd/b8c837_eff86e84fdb74fc0bf2afd4af8b1ec6c.pdf
    • https://static.usrfiles.com/ugd/9e53d4_f33199133c2e42babcea13ed080d5949.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_601bd766f9cf48d49a9be0e25766fe9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f3cd09ffc994c1f9ca8a27c62383c76.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/epidural_anesthesia_in_labor.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4679/files/business_proposal_sample_powerpoint_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/beehive_class_9_rain_on_the_roof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9072/files/45764985407.pdf
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/sebow.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d3.bin
9c7ed467b1e4ab8588fa8a9ae852d73a75c738ef0c459dbbfeea4b4dcbd973b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 5036 bytes
font_01_sfnt_off00007abe.bin
a80c4383d96c5343d18a32fea31a93b4fdf49b0ac394d955752946382d2e6155
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABE 11932 bytes
font_02_sfnt_off0000a028.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA028 4324 bytes