Malicious PDF — malware analysis report

Static analysis result for SHA-256 92486aef8382bd1a…

MALICIOUS

PDF

38.6 KB Created: 2020-09-01 04:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a87d4277d87ffbd23e9c00528aa2cf41 SHA-1: a73f57f58ba873a8ee7755fd2df3cd24d5557dae SHA-256: 92486aef8382bd1a5dd6019b6759fe138ac72cfa3699b0488fd2824b86ee7c65
128 Risk Score

Malware Insights

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

The PDF contains a visual download button lure and embeds numerous links, including one to a known malicious redirector. The primary malicious link is https://ttraff.com/wix?keyword=icab+past+question+answer, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on Shopify, suggesting a link farm or content distribution strategy.

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=icab+past+question+answer
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/45821083905.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/94378534874.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/gidafusufawazeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/nowefiwaximubidenowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/lakabupigumopejuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/introduction_to_statistical_learning_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9449/8709/files/66975125771.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/walt_whitman.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/kamukafedanefibozid.pdf
    • https://static.usrfiles.com/ugd/238140_5db8c58e7b454b0eb8bd0bfcb6ff99cd.pdf
    • https://static.usrfiles.com/ugd/238140_679604f4620e4440a71e4d49828a5422.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b6a671e68074d0092aa7839ba5754c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/b5472a_e05008926dc34b51ba978ff98fa88d5f.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_off000056ef.bin
195d0e7c0562b12af1c7be0e8d3d789e52cbc1dfaf8b6fffa8a3b1b1b1ab1b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56EF 5192 bytes
font_01_sfnt_off000068bb.bin
c07ae6b1cc2f8de6742b4149df65792b26f3a5f74ba76c99d26e00f24c317cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 11012 bytes

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