Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c39b34ee9e4f66…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e6827e7987d7c548d802d168383e7d SHA-1: e62648cba3703f4dbb47890f0bc8052a1f7acb4e SHA-256: d3c39b34ee9e4f664dcb4b1e26037789f3557ca925dbd7dd8771fe647f815020
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by the heuristic.

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=agama+islam+sebagai+agama+rasmi+pdf
    • http://files.sheng.studio/uploads/1/3/2/3/132302787/5644156.pdf
    • http://files.fonkgerdi.com/uploads/1/3/1/8/131856860/batak-fupibugural-xezijoli-zerosemoji.pdf
    • http://files.giniasgems.com/uploads/1/3/0/7/130775707/jenezin.pdf
    • http://files.thebellevie.com/uploads/1/3/2/6/132682210/lerej.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/94660335105.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/macys_redding_ca.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/nexerozorifijel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/zijojopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/73353907722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/43540913456.pdf
    • https://cdn.shopify.com/s/files/1/0428/6981/7511/files/71605404095.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/accountancy_class_11_ts_grewal.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
stream_005_off000096a8.bin
19746996873e87f4b718912392f8837823d34348d144580915d0c927b27c3b7d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x96A8 17512 bytes
font_00_sfnt_off000061ec.bin
27aaed448bb1d3d44a752ca860823b6e17e66c51ed35668cccae491af21865d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 5492 bytes
font_01_sfnt_off00007480.bin
ba291f06074e0b5643e7390370ff40d2ba0b1c64678129b277ad5e91521521d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 9908 bytes

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