Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3036c03fd4767f…

MALICIOUS

PDF

61.0 KB Created: 2020-09-17 14:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5e1e781d253ad468576c3b9c23efdb SHA-1: a6c2bec593b43a805d381db9e02403e263a237a5 SHA-256: 3d3036c03fd4767f6eafdab11186be16c3a24c223f7ee441d57bd8871bff32e8
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is designed to appear as a guide but redirects to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning attempt to increase visibility. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=dipper%2527s+guide+to+the+unexplained+episodes
    • http://files.pathwayworship.net/uploads/1/3/1/3/131398374/1a6ca4ec.pdf
    • http://nebopite.innervention.nl/uploads/1/3/1/6/131636725/lojesuge.pdf
    • http://files.timsfantasytips.com/uploads/1/3/2/6/132682655/6258120.pdf
    • https://382f65ba-83b2-4a90-94be-a60f7e42c957.filesusr.com/ugd/f35da0_2dfd26cc7fd5429b931dda4e218ee3c2.pdf?index=true
    • https://0468119b-f622-45bc-a079-253aa7bb6615.filesusr.com/ugd/4479ed_c20e31a0d59145978ce8f6a0ed40c660.pdf?index=true
    • https://34a8f68e-3a11-4dca-9347-0ca29e1e8184.filesusr.com/ugd/529385_d3e727603c9c456b999013c8c8315eff.pdf?index=true
    • https://99e2c452-266f-40f2-b851-57a252c149ea.filesusr.com/ugd/906e9f_0c4bcb180aaa45de8482e351b52c7f2d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/levod.pdf
    • https://cdn.shopify.com/s/files/1/0477/1256/7452/files/60466853962.pdf
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/65720756386.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/69662349988.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/xavilanepibosalip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/3596718672.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/ronawazodajixefiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/butiwinefizevepe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a45f.bin
b8b533f4744c596d368c11a3428db92512e6f62281e6072ee0295240b126b3c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA45F 5324 bytes
font_01_sfnt_off0000b680.bin
20558d487bd2257fe2f4602c972eae59cdf3d901bbfe8a4cf7f3997aaeb5a068		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB680 14692 bytes

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