Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6bb451fa564159…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 18:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0c20fdff7c15850ce6fd0b0154f0eb SHA-1: 2bfa545bc456f28ceb24559a0625c66f08914a02 SHA-256: 7e6bb451fa564159c49d914532c149d7aa6e98cc67fe2714f01f9f10165baf1f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector. It also features a PDF link farm, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to drive traffic to this malicious site. The presence of numerous other PDF links, many hosted on Shopify, further supports the link farm detection.

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.ru/wix?keyword=formation+dialyse+peritoneale+infirmiere+liberale
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/gizeselizujaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8551/3379/files/46373590309.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/rasipopuzekolorogegolon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/novafadipovuf.pdf
    • https://static.usrfiles.com/ugd/a4d998_03408f2be438472e8783c0eaf6bb43e4.pdf
    • https://static.usrfiles.com/ugd/33c377_36f0a0e5b35f4c978157dbc28bbd33a0.pdf
    • https://static.usrfiles.com/ugd/1be480_2541441e628c4ade91038db9b6f80ffe.pdf
    • https://static.usrfiles.com/ugd/432b07_b36caa81e20f4b98beb859267ac7c182.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0f184f9bf4349768a38ab38577e1672.pdf
    • https://static.usrfiles.com/ugd/07e02c_2705f748c4824ba088058943c3c9c94b.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6945/files/rupufazujikazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6673/files/fallout_new_vegas_nexus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/wanabalisamiwizezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/ac_market_apk_editor_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/23245179494.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_off00005cc0.bin
b6afa0316f6f0f8d9baf92c57cbae8e5f6a91a1c740107d7c2edf78550267232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC0 5384 bytes
font_01_sfnt_off00006ef9.bin
dc9966e6842025b438596a075ad6e674c51681b3bcdc55168381ff25e801e6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 10356 bytes

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