Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb610cbd6eb16f5…

MALICIOUS

PDF

40.0 KB Created: 2020-08-09 06:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8656bc5be73ee5409ac4880e3be17c8a SHA-1: 3396c37d4f48f5f166e91521d176747edf0afe23 SHA-256: 4fb610cbd6eb16f523d0f29a188b2552055acbe8ad12921781c5e3f14319327c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. One prominent link, however, redirects through 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'medical negligence case law' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary attack pattern involves a link farm designed to obscure the malicious redirector.

Heuristics 3

  • 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.
  • 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/pify?keyword=medical+negligence+case+law+in+south+africa+pdf
    • http://files.lucreciadesignsllc.com/uploads/1/3/2/6/132682204/4955270.pdf
    • http://files.sfchoirs.org/uploads/1/3/2/6/132695639/51660b245.pdf
    • http://files.jamiehillman.net/uploads/1/3/0/7/130776639/vutitijinegujob_revifevim.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/susabadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/calisthenics_workout_and_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/deginemodotanevisoju.pdf
    • https://cdn.shopify.com/s/files/1/0449/0860/9703/files/sudewopaduseka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/luzopaxosusegamugadisix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/10781337151.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/14602823613.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/delete_local_commit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/jetojunirekeleviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/movefaxixojugoxis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/aircraft_mechanical_systems.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/dugonukilubareximip.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_off00005f2a.bin
9ba3f0e2ae044cb7d6925b8904dd50252ab3082b47bf2b1daceeec470f2263f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2A 5512 bytes
font_01_sfnt_off00007200.bin
b4d3c6ec81970bca47e134424dd821534c4e34040f09e9598d7c87e72a64ac14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 9732 bytes

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