Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9a6fac4099c6a7…

MALICIOUS

PDF

39.7 KB Created: 2020-08-27 21:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3c74839ef846f78680e5c58ea43ace SHA-1: 73fd68513be2d695cbaced71bc450294363f7bf9 SHA-256: eb9a6fac4099c6a761149734f6521c79986c8aba16a0944290e99f6a609b2832
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure related to 'Captain Tsubasa'. The presence of a link farm and a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery. No scripts were extracted from this sample.

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.com/pify?keyword=captain+tsubasa+nes+english+rom
    • http://valotamej.gorgehcfa.org/uploads/1/3/0/7/130739430/8234369.pdf
    • http://maniga.warringtonstammeringsupportgroup.co.uk/uploads/1/3/1/3/131383541/2372371.pdf
    • http://files.gothicmusicarchive.com/uploads/1/3/0/8/130813730/1140122.pdf
    • http://files.castlespacovers.com/uploads/1/3/2/7/132710783/tetefof_wojuxoditewuz_golabipunokasud.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/87950554082.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/4639776430.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/51616861596.pdf
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/bleacher_report_mock_draft_nba_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/pan_card_correction_online_uti.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/5_why_accident_investigation_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/31483677359.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/96018609152.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/32764168715.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_off00004c2c.bin
f71af145d5b8575dc6a8b5cb493a321c7031f1e6514369d14ced81ea6d0d6701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2C 4772 bytes
font_01_sfnt_off00005cc7.bin
289155f5d2991750d2d305b07194bcc23236e62a03cc0631e79124279cd75a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 5280 bytes
font_02_sfnt_off00006e85.bin
d240749d5b5b454a9f48704237088f7a2e5c5bec4accd4e9f397a7f16ec547d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 10364 bytes

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