Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba520bae6a6623cf…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 20:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b109b4376b6b2c7e787bc32ef83612c SHA-1: 01568b2dcd9b95bfddb0be486dbf6e6a120815cc SHA-256: ba520bae6a6623cf5a6c0d3430a2e475ef919b99380cdba10629e98ed8ab29e2
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text suggesting a lure related to 'short term memory worksheets for adults pdf'. This indicates a social engineering attempt to drive traffic to malicious infrastructure.

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=short+term+memory+worksheets+for+adults+pdf
    • http://files.pathway2well.com/uploads/1/3/0/8/130874010/542223.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/cengage_neet_chemistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/4518/9794/files/podira.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/13220010510.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/19094739726.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/icelandic_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/jabef.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0710/files/63906512737.pdf
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/georgia_criminal_justice_reform_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/reledeburejivizikofibefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/10684197607.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_off000062ff.bin
e60111ee2bbe44eb2ddc6e3b9b354cd779325e5f2460fe262f784d8b41c98c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 5644 bytes
font_01_sfnt_off0000761d.bin
ad0f1177bd40ffe2376884bf2d7a19177f2214d1cbb162c22a05449399563e50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 10136 bytes

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