Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec4350aa1e1d960…

MALICIOUS

PDF

66.6 KB Created: 2020-08-24 20:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c44cc26054bec64bbfb4cb5b58dc3a SHA-1: 4ac7605398159c76faab9f9f3a39a6185ff2f408 SHA-256: 1ec4350aa1e1d960580ab8706d231bd8a4f1570d055f72c24047130e945722b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL (ttraff.cc). The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to interact with the command line, suggesting a multi-stage attack. The primary intent appears to be redirecting the user to malicious infrastructure for further exploitation.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=android+api+level+history
    • http://sedajuwa.carolinehubner.com/uploads/1/3/1/0/131070841/3955041.pdf
    • http://files.gelhausdentalclinic.com/uploads/1/3/2/8/132815045/447739.pdf
    • http://files.mrsheridanenglish.com/uploads/1/3/0/8/130874307/9396613.pdf
    • http://files.lovelizex.com/uploads/1/3/0/9/130969624/3fc445d76f1c5c1.pdf
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/donif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/32481904952.pdf
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/include_in_latex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/wabadanujazuzesikopud.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/mepisazazefufitogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0006/0310/files/lopusuweloponitoto.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/60137889802.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/9282006013.pdf
    • https://cdn.shopify.com/s/files/1/0431/6941/5327/files/new_orchestra_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/78157051867.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/85729976513.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/danabesimefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/wajexemefufegejezogifovaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6717/8134/files/wamagan.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_off0000b7b9.bin
4b3e7a4ace3328b87214396e39fc5111bca5e6d213ee4f06c6ce04a9418e5a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B9 5196 bytes
font_01_sfnt_off0000c961.bin
81093cdf009872a47b39b7ad4c26dbb5f97c6cdf76a700774710f7ecea32997d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC961 16648 bytes

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