Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9609e9b62f684d5…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 12:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 462966a2a5e0f75bad7c37079df03075 SHA-1: 4db0fc2fd488045c12aa5b959aea753b62985584 SHA-256: b9609e9b62f684d5f894671e93abb6b6e6ca48f3d0aca29c4858a7c01a6aa333
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a lure to trick the user into clicking the malicious link. The document body, though heavily obfuscated, contains the malicious URL.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+to+html+pdfbox
    • https://static.usrfiles.com/ugd/b8c837_941a267a2d6b460f93fc17b5f551428b.pdf
    • https://static.usrfiles.com/ugd/197ed4_7e55bd97e625406ca647d0cc0481cd91.pdf
    • https://static.usrfiles.com/ugd/735189_0670ed1d528647759e179b51deca0835.pdf
    • https://static.usrfiles.com/ugd/66c878_4f9bff62dc1a4b24955af5c6b40238b0.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/18355966537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1a318ed707480780e7c1d766f775bb.pdf
    • https://static.usrfiles.com/ugd/b28561_80b4a25baf64442da8ffe4b7b66188e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f6e0a5b89b14037a7c44b6d91043543.pdf
    • https://static.usrfiles.com/ugd/82e28d_1554dda02a934ce59bacaa5f94a65724.pdf
    • https://cdn.shopify.com/s/files/1/0461/5520/2723/files/national_dysphagia_diet_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/makalah_tentang_bani_umayyah.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_off00006149.bin
d99e0397fb07c03bebca967bfab19bf9d77ac57e062bbba7e193c011b2185358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5008 bytes
font_01_sfnt_off00007237.bin
75b6d1109b630d76d7ef77562c77a436b5d9c9858110c2d5fb739c5eedb6cf85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 10232 bytes

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