Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc74772cb2805ef9…

MALICIOUS

PDF

39.0 KB Created: 2020-08-07 21:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068a9648eb2c50b0af23560b2d2dafe9 SHA-1: 35adaa5d64d6f9193deaa44f0d46fda4b5fc02cd SHA-256: dc74772cb2805ef9e3713cff0533086ec8edcf19b5b5549f9f3a8479f6524a94
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 Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a malicious site, likely for further exploitation or phishing.

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.cc/pify?keyword=ashtanga+yoga+poses+pdf
    • http://files.overcomeyourvaginismus.com/uploads/1/3/1/3/131378771/e84915d5eef985.pdf
    • http://files.prettygoodideas.studio/uploads/1/3/0/7/130775109/c533b7.pdf
    • http://files.ritaonrealestate.co.uk/uploads/1/3/1/4/131437806/fozoxokovonivad.pdf
    • http://files.barnsandburleycandleco.com/uploads/1/3/2/6/132682882/e27767bf7b70a52.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/what_is_an_example_of_assonance.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/21317184557.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/36411195290.pdf
    • https://cdn.shopify.com/s/files/1/0430/6465/6026/files/adventures_in_middle_earth_players_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/belezisabojapogozafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/74495333003.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/lirumofibaralixavixane.pdf
    • https://cdn.shopify.com/s/files/1/0433/3086/3259/files/99614826914.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/kodajiwesimevuxofivamun.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_off00005aba.bin
4de00277cbfefaf41e2c197f6161e849970a4020fcc41da10afe8c745b265b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABA 5268 bytes
font_01_sfnt_off00006cb8.bin
60b2366dd5b64ec7b5229f28c500607fb5bf539e6796cc4bbb41a7b3a70b6673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 10808 bytes

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