Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d52cf79471a835…

MALICIOUS

PDF

50.7 KB Created: 2020-08-31 10:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a937129499a94c1a76b2cbe224ac92c SHA-1: 37ef8672e34865cfc1653baac95162ad156bebe3 SHA-256: d6d52cf79471a8358ee143a575cacca57a4dd0f92efec4d63272ee6ab6516824
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.cc/wix?keyword=Hauskoja+joulukysymyksi%25C3%25A4+lapsille', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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/wix?keyword=Hauskoja+joulukysymyksi%25C3%25A4+lapsille
    • https://static.usrfiles.com/ugd/b8c837_ceb5fd6219bb4f58a28047c1bbfcf87a.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_7c8c128c79f84a4182b5b1394f77bde1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0145bf18c102466d8f84fc9a9089e9d3.pdf
    • https://static.usrfiles.com/ugd/f967ac_5b2e169e40414f0c9095f17103e691ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecbae893454846a49b35a5d79251e6c3.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/41410808115.pdf
    • https://static.usrfiles.com/ugd/a59130_8fa18389b07148168dbbded5577a71eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21ab562a21423da427b2b5f7edfb67.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/gregory_porter_ft_kem_holding_on_dow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/winston_operations_research.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_off00008779.bin
12dc22a085f217c35be7105fddb6debb3b59f7c3fc1d4aa3ba999fc7adf8348b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 5308 bytes
font_01_sfnt_off000098f7.bin
66dab22b32a85b4b522b6b967d8057b371b3ee54789d06c094371fc006a702af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F7 10556 bytes

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