Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd650f5ad8b584d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 07:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ea08ce7673b3d2cf7251e9b688065ac SHA-1: 12d28852ca921b575f6ce4ffaa09c130eb81545e SHA-256: 3fd650f5ad8b584d15d4096f87f991c105e3a174f2402e1bfcf431a22b406f9d
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, identified as a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=cohesion+vs+coherence', is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains binary data, but the presence of numerous links suggests an attempt to lure users to external, potentially malicious, websites. The primary attack pattern involves leveraging these links for redirection.

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=cohesion+vs+coherence
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/53150004082.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/belurek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/asian_games_2018_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/18921285219.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/vekofud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/alphonsus_liguori_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/zekopuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/capricho_arabe_tab.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/83852842446.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/sewunebaxigub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/cat_s_cradle_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/43748399681.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/tabla_de_derivadas.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7709/files/mufolapuje.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/sevaramamid.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/open_mp_files.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_off00006457.bin
711caf118b562d74ad86593c7d6525185b2226fa350d0d6e0245362e4535ba77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 4612 bytes
font_01_sfnt_off000073fd.bin
182270dfece7789e6634d6fec2c48a87158d6ce3ae45d7e37532a7a287975f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FD 9624 bytes

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