Malicious PDF — malware analysis report

Static analysis result for SHA-256 52affa950165595d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 18:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 050ae44cd967c88d91e07080c126dc98 SHA-1: 3471c943fb04a7d9ec34e3125cc9820c6f3c368c SHA-256: 52affa950165595d4febd4c178c3b82be4a0673879512f6b91e3e9e10ed72d68
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it leads to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the primary purpose is to redirect users to malicious sites, potentially for phishing or to download further malware. No scripts were extracted, but the link farm and redirector indicate a clear malicious intent.

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/pify?keyword=biomagnification+of+pesticides+pdf
    • http://tarapokav.livinitphotography.com/uploads/1/3/2/6/132682261/e475f4f528f.pdf
    • http://gogivajak.thenextindianajones.com/uploads/1/3/1/4/131438233/5403280.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/luputabivodevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/bimoverazidapepojox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/zunasowenozoxujeloz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/79041086102.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/grammar_test.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/50930660612.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/govudegudivibexodiwa.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/taritibataduso.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/64213595790.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/3623053214.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/mitodi.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_off00006a71.bin
1ad209dd512c3609cc4315274c4451184fd553f53d07b50845fa453334ce484e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A71 5396 bytes
font_01_sfnt_off00007cb8.bin
195da71a5c48122507eb0d853753cf0fe1b16b93ba6cba90c4ae1cf5f4cb0dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 10200 bytes

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