Malicious PDF — malware analysis report

Static analysis result for SHA-256 48128e1078351faf…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 14:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9304c3af4d37017ac4d409b0a30b115 SHA-1: 349a0e5720998901d8511beb18a6b9a8c8599891 SHA-256: 48128e1078351fafc6a8c76d1ab1918e883c13d1449c2eb779cd4e699e21020e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a search result for 'hotstar app iphone 6'. The document also functions as a link farm, directing users to numerous other PDFs hosted on cdn.shopify.com, likely to obscure the malicious intent and spread traffic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=hotstar+app++iphone+6
    • http://files.wthair.net/uploads/1/3/1/4/131406149/pubira.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/mezididisorenilori.pdf
    • https://cdn.shopify.com/s/files/1/0436/5923/1385/files/interpretacion_de_una_biometria_hematica_completa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/77227742647.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/nogudelorepaxawagenavovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8978/8069/files/idsa_candida_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/xosox.pdf
    • https://cdn.shopify.com/s/files/1/0439/0138/6920/files/94229958153.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/jrotc_air_rifle_marksmanship_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/14088322775.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3151/files/nimeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/al_forsan_international_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0462/6907/1511/files/penunega.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/riwewamovonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/kupijidakopetorewagejuj.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_off00006df5.bin
3d72234e1ac7bb6e77decad6dd531e86741058a972ba51cbd18180aeafd96293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 4992 bytes
font_01_sfnt_off00007edb.bin
362c75b2f83e1447c0c38b8c30693ff809ba2c6d9a0d4944f1d4a96fd249ecf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 10412 bytes

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