Malicious PDF — malware analysis report

Static analysis result for SHA-256 b767807ff5679fa8…

MALICIOUS

PDF

52.8 KB Created: 2020-08-23 15:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2998c61a0a4894540c9ab973b6bd0bd3 SHA-1: 6669c2c8801b2cefc127ab2f4351fb8e38cc925f SHA-256: b767807ff5679fa8e0bbea23bf7cca6f41aa113fc9f83bb7db0e8687c98b883a
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for delivering malware. The document body also contains obfuscated text and multiple embedded URLs, many pointing to Shopify, suggesting a link farm for SEO poisoning. The presence of a password-protected archive lure heuristic indicates the document is likely a dropper for further malicious content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=autodesk+maya+2013+free
    • http://files.conradstroebel.com/uploads/1/3/1/1/131163872/324031.pdf
    • http://files.crochetmilie.com/uploads/1/3/0/9/130969926/c48e85.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/glasses_png_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/wotetolajesamodakuxopun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/6680074062.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/pdf_split_and_merge_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/chemistry_a_molecular_approach_1st_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/babulal_calendar_2019_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/one_piece_free_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/60968929978.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/zikokovavavifowusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/kupovikabivajezimopidugi.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_off00008f00.bin
ab6f8415ca6e2312ca4aaa6c600fc486ff40036d8b6f1e7e9580cb6a0f525d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 5668 bytes
font_01_sfnt_off0000a23d.bin
0c2bb8fee4cb08d633870fc158bdfd7eb0d3d32c4191ebc6a75b4a3664151790		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA23D 10792 bytes

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