Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3d2c4dd52310c4…

MALICIOUS

PDF

35.8 KB Created: 2020-08-13 23:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a781cd193f70800a92e4320f404da41 SHA-1: ef7a55d299d84b0df539be502f755bfed51467bc SHA-256: ea3d2c4dd52310c4cd455a5c50960bf0b6ca37d7d04bf61246586768df6cd209
120 Risk Score

Malware Insights

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

The PDF file contains a link farm, with one prominent link leading to a redirector. The document body text, though heavily corrupted, contains the phrase "Rowdy baby video in tamil" and the malicious redirector URL, suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute 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=rowdy+baby+video++in+tamil
    • http://files.yourpersonaleconomist.com/uploads/1/3/1/4/131408942/0057d44e51.pdf
    • http://leseru.inquirybuddies.com/uploads/1/3/1/3/131383965/6578924.pdf
    • http://files.discoverdp.info/uploads/1/3/2/6/132682124/lesalu.pdf
    • http://files.mx.danielreinhart.com/uploads/1/3/0/9/130970022/nibukulosigugeb-xalezolipidoj-puzagufolexaru-mozezujodama.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/8487543974.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/69658127818.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/catecismo_catolico_para_la_primera_comunion.pdf
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/tanifuxisidobutijaxepum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/85614750896.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/bikubesafonifufit.pdf
    • https://cdn.shopify.com/s/files/1/0436/4209/3728/files/antrenmanlarla_matematik_geometri_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/universal_definition_of_myocardial_infarction_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/rosobid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/riwiva.pdf
    • https://cdn.shopify.com/s/files/1/0450/8103/4917/files/brevet_2020_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7398/4919/files/biochemical_test_for_microorganisms.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_off00004cb6.bin
be29fbc513b30dd20d7e00dde9c329161829c0415af38303c6722a1923b64f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 5100 bytes
font_01_sfnt_off00005e21.bin
9e226fc0847c91a2b315b77fba17a9146a3517614e2456dd80e8486be3417552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 10576 bytes

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