Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db04bd9ef66c43e…

MALICIOUS

PDF

56.7 KB Created: 2020-08-24 13:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7584277bb27d943c55751d4c5aea2ee5 SHA-1: 09b2ebec5ba86113b4dfe42e0b7ff7df8a16869b SHA-256: 8db04bd9ef66c43e7f8cede096fcacabd7f516c3134d3eb9a3e8593ce734b6cc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a fishing report and the URL that triggered the malicious redirector heuristic. The presence of numerous external PDF links suggests an attempt to create a link farm, potentially for SEO manipulation or to distribute further malicious content.

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/pify?keyword=ship+creek+anchorage+fishing+report
    • http://ruberokof.rvsdmusic.org/uploads/1/3/0/7/130738847/valiwuwo.pdf
    • http://denasev.samanthianixon.com/uploads/1/3/1/4/131453045/7b10054.pdf
    • http://vewiban.successfulbreastfeeding.org/uploads/1/3/1/4/131438641/6d7014f2.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/alphabet_cursive_writing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0457/3695/1964/files/33495513395.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/7515533387.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/attestation_d_hbergement_lcl.pdf
    • https://cdn.shopify.com/s/files/1/0435/6754/6527/files/54833168258.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/pikekarojixobowimavuwaxef.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/ranugijesir.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/jidivisugoveral.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/50_sombras_de_grey.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7619/files/61906011823.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/liwaresojodigaj.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_off0000a046.bin
bd44c1be8896c07814595c2908ab82de065cd9f87c5e9c7975d8f7c19fb6e0b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA046 5412 bytes
font_01_sfnt_off0000b2a8.bin
843525c34e7bfa56d51352295c22b2c4b14a33799847c7e6a8e9c20f70c1910e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A8 10556 bytes

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