Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab55f6ae528370f…

MALICIOUS

PDF

38.7 KB Created: 2020-08-17 01:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3df1cb87b9a83e888233d69ccfb1bf54 SHA-1: 2c6ccf8020b0c6d5336bc95dfc8bfd1c691be515 SHA-256: dab55f6ae528370f8b35f03392b79101036efeafe09ec844c811dde804d5dfbc
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 external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=fundamentals+of+engineering+economics+third+edition+pdf, which appears to be part of a link farm designed to lure users with academic-sounding titles. Another embedded URL, http://mijodejob.mexicanvillagegf.com/uploads/1/3/0/7/130776007/tuwalawikutozadeweb.pdf, also warrants attention.

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.cc/pify?keyword=fundamentals+of+engineering+economics+third+edition+pdf
    • http://mijodejob.mexicanvillagegf.com/uploads/1/3/0/7/130776007/tuwalawikutozadeweb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/risiruzurikazifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/48172260850.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/47111897032.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/jovitowefojox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/55537071461.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/63387114943.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/memobatubez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/gre_analytical_writing_argument_topics.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/6984539838.pdf
    • https://cdn.shopify.com/s/files/1/0448/0057/3601/files/demip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/gonef.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/king_arthur_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/32167363726.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a60.bin
20a0252d100d544b15697032f805c9fac48a766c1104a295a8d62536dc3fab72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A60 5408 bytes
font_01_sfnt_off00005c91.bin
0b9b5c91ff3ec707175504c386c3b23250ae8c59364d4f4edb2f5dac936e645b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 10316 bytes
font_02_sfnt_off00007fc9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 4324 bytes

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