Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3aac1d637baf6cf…

MALICIOUS

PDF

35.0 KB Created: 2020-08-11 19:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88def5d52e1c0d2c406242407bf800e7 SHA-1: 4fed5a392d1d5db3e4d689f181e7fe7d684bae29 SHA-256: b3aac1d637baf6cf4ba4f4dbf563a8f6e1c82ccae4c5ffb048a1fe356a5d6279
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Hindustan Unilever annual report', suggesting a lure to trick users into clicking the malicious link. The PDF also contains a large number of external links, indicative of a link farm.

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=hindustan+unilever+annual+report+2020+19+pdf
    • http://files.pcelpc.org/uploads/1/3/0/7/130738512/5136304.pdf
    • http://files.artistryonmain.com/uploads/1/3/1/0/131070393/4c5dc8501f3f.pdf
    • http://vixosonij.lesscomplicated.net/uploads/1/3/0/9/130969723/volawun-duzejup.pdf
    • http://files.therissarissablog.com/uploads/1/3/0/7/130776775/sakedubijebivakove.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/automatisme_programmable_industriel_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/wevewiwikogubiwawamawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/59743225886.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/20733928267.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/e5_a4_9a_e7_91_99.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/bossa_nova_solo_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/xinipag.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/cottrell_critical_thinking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/certificate_of_service_sample.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_off00004955.bin
96f7b07fe7d773d0a9bdb22fbcc78211d665d1b0d429cca973241c5537c68bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4955 5540 bytes
font_01_sfnt_off00005c31.bin
95638f9320a1c367761353d27db5c56bc59949811dfbf8782634ca0888a16b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C31 10184 bytes

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