Malicious PDF — malware analysis report

Static analysis result for SHA-256 df37834eb490589c…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 13:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae01d6f04d0b071dcaa0084a3b075e2b SHA-1: 77ad74b180ed6dbc98ab074340426d16c172c311 SHA-256: df37834eb490589c2cd755c14880ae7792d1d575ddd795c883651f5f86e77f60
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.com/wix?keyword=wilderness+medicine+pdf. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=wilderness+medicine+pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/58572572066.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/60483271544.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1145/files/pilene.pdf
    • https://cdn.shopify.com/s/files/1/0440/4638/5317/files/86281923472.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/lopekixebo.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9c578f1fca946be8a8148f259330973.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d758355a40747b78d801443d6e8c92f.pdf
    • https://static.usrfiles.com/ugd/b8c837_897c27c9596f43bc9bb8ce3bb61fcd37.pdf
    • https://static.usrfiles.com/ugd/2c8d66_fe8b1ff5a947431a81fcb2b6eea7b17d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9becf97edb5b47ac802ddac25e54f8ba.pdf
    • https://static.usrfiles.com/ugd/0df15e_8f07a8cb3ad64ff7b99b7cd3dee40129.pdf
    • https://static.usrfiles.com/ugd/0047a4_fb1eaadc884a45e89501c7fe581233f4.pdf
    • https://static.usrfiles.com/ugd/1849a1_4ef02a53836d490f98b08d230362cac5.pdf
    • https://static.usrfiles.com/ugd/e42ee3_76f7a8693b904031aaf4b46ce24d2a24.pdf
    • https://static.usrfiles.com/ugd/6f7357_8cfba63ef99e4723bdb1c1987a79f54b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ad7be5c8a2d49129316fa4099f232aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_86e0a1df3c06419284ae1ae96e394199.pdf
    • https://static.usrfiles.com/ugd/b8c837_2694293acdc94bc78151d85ae443748c.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_off00007950.bin
8062839ba5b76fd17af0c6c641481eba73c5f52743bda52bc23c8dcc3828f13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 5104 bytes
font_01_sfnt_off00008aa6.bin
2ca5fc9588caa7f1376441fd0de5fb91b1c92ac36ef2a85eab301b46b19ed1a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 10292 bytes

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