Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf5f6918e7a6aec…

MALICIOUS

PDF

56.2 KB Created: 2020-08-10 06:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 710b3042c69c5103fe8ce19ea5f041b0 SHA-1: 7dbcbaf36a64a8e2beb0db5c4a2f4529d5b09234 SHA-256: 2cf5f6918e7a6aec278a4289844b25cc0aff68ab5069a89ec6c569b308330625
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to lure the user to a potentially harmful site. The presence of numerous links, many pointing to Shopify domains, indicates a strategy to obscure the final malicious destination.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=algebra+questions+for+ssc+chsl+pdf+download
    • http://watezuk.poeticp.com/uploads/1/3/2/6/132682076/5986037.pdf
    • http://files.clearlakedebate.org/uploads/1/3/1/3/131380171/1038f86.pdf
    • http://files.appalachian-auditorium.org/uploads/1/3/1/4/131410812/8850719.pdf
    • http://vafixi.crossfitantrim.com/uploads/1/3/0/8/130874359/3ca53ec0c38ad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/pusesotobip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/zivipazani.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/27011464904.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/vowasuxujeviwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/2939379937.pdf
    • https://cdn.shopify.com/s/files/1/0428/6660/6247/files/mivipagizeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5866669006.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/96311586782.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/47654246424.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/88345898238.pdf
    • https://cdn.shopify.com/s/files/1/0433/3115/8175/files/college_physics_a_strategic_approach_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/63495613584.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000701e.bin
423420ca3453c757f22753a89cea0d3ca970272237a4acdb354c6d020b58bb79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 5764 bytes
font_01_sfnt_off000083b6.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 3720 bytes
font_02_sfnt_off00008f19.bin
c9ea2c4418b1c92f93486ed766e5d990556d6729e230d78f73ce7e422121d241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F19 10756 bytes
font_03_sfnt_off0000b3e7.bin
bdb01fe16e2c5855fd936048a62b79497aa480060599dc981339781166d23fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E7 9492 bytes

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