Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a1743dbf798d26…

MALICIOUS

PDF

63.7 KB Created: 2020-08-31 10:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a156d51d0b6f858094972a4cfb731f6 SHA-1: 3e6f36abf162093d18c1bfd4925ca527802a4a01 SHA-256: 53a1743dbf798d263f1c764d04b0f6695cd7c9d6333fffdf70b7738666c7714a
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 specifically flags the URL https://ttraff.com/wix?keyword=siberian+mouses+mm_30 as pointing to malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to obscure the final destination or distribute traffic. The presence of a 'download button' lure further supports a malicious intent to trick the user into clicking through to a potentially harmful site.

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.com/wix?keyword=siberian+mouses+mm_30
    • http://sharingfiles.ws/download/folder/1743421
    • https://static.usrfiles.com/ugd/8de238_55e81f69dfab4c75a6f4c7beb094aa35.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_1c19c3c2ee3e4338bc463548b607c528.pdf
    • https://static.usrfiles.com/ugd/7f46b5_0a289d3d11ad4576bede757c2f7eaeef.pdf
    • https://static.usrfiles.com/ugd/278743_41d8f573c02c45b3a82655eb30477833.pdf
    • https://static.usrfiles.com/ugd/33a16d_051772f176bf486ca7ed206c7a13f595.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8cec578f8b942bfbaceeef63fab3667.pdf
    • https://static.usrfiles.com/ugd/b8c837_c762cac771034d9f9681d8e751bb0e0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e0d526506b431ab5c943c5b52a4383.pdf
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/manual_lathe_machine.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0455/files/dezuki.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/74426590135.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0438/4958/0704/files/curso_de_analise_fundamentalista.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/48053069131.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/88715576574.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ea6.bin
64d2bae3176bab35271de66f0f497fa0045dad83682451568c126463f18faf5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA6 4568 bytes
font_01_sfnt_off00009ea3.bin
86c06bd1cf5c5240d8537aa05c923d93f3f39fbfeef3b8e0faa5b8fb7bbfb347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA3 5380 bytes
font_02_sfnt_off0000b0cc.bin
32358e11195b7bc74dc69b1ec77337797b27d2319967fb2d51345f7f977fbe63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CC 6520 bytes
font_03_sfnt_off0000c2bf.bin
bdd1e2aaa4e19fe3e74952024c389dd9356064468704af4cd9065c81e49a8efe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BF 14932 bytes

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