Malicious PDF — malware analysis report

Static analysis result for SHA-256 4276c4d2435687fc…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 08:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 471726f6f197a5305d791df669ac8876 SHA-1: 1c0125e3e772e6405184a0e4168d2ec7041b8e4c SHA-256: 4276c4d2435687fc881e50477ef56e976407ba75c191d45803f49843a190f929
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, masquerading as a document about statistical analysis, to redirect users to malicious infrastructure. The primary redirector URL is ttraff.cc, which is known for malicious activity. The document body itself is heavily obfuscated and contains numerous URLs, many of which point to Shopify domains that are likely used as a front for hosting malicious content.

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=univariate+bivariate+and+multivariate+analysis+pdf
    • http://files.elfiesrefuge.net/uploads/1/3/1/3/131383771/77dbaed666d4a51.pdf
    • http://sonuraxe.n7yv.com/uploads/1/3/2/6/132696030/kakusik.pdf
    • http://files.joyfulnoisepreschoolsandy.com/uploads/1/3/1/4/131437636/1828766.pdf
    • http://rozawu.oxfordleamingtonclinic.com/uploads/1/3/0/7/130738799/kigivi.pdf
    • http://files.rickiemartinlending.com/uploads/1/3/0/9/130969573/rugelajolajufur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/jinepipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/88710068290.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/9217672847.pdf
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/biochemical_oxygen_demand.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8504/files/56016782681.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/10899507186.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/foraminifera_planktonik.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/gadeku.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/26305218285.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_off00006ce3.bin
3fd295e42461d948644eaefa86f5c790beda2b1eba51657de10f0fe78f701a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE3 5480 bytes
font_01_sfnt_off00007f78.bin
f314d5e0ac20898a8f13b384ecad1be2aaddbc7b9d183a0a56706fe710e9aa22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F78 10544 bytes

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