Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c60aa47248abcef…

MALICIOUS

PDF

36.1 KB Created: 2020-08-31 09:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ac1e4bfd60247d27cd80fa505b79ce SHA-1: 072a3fc377a96762e9ba4613930f22d737cdb859 SHA-256: 0c60aa47248abcef6e7b09dd1fc48e8bea5d315182ad7ecea4cf28175fc60099
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains the same URLs, suggesting an attempt to disguise the malicious links as legitimate content related to NCLEX-RN examination review. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=evolve+resources+for+hesi+comprehensive+review+for+the+nclex-rn+examination+4th+edition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/morrowind_spear_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/5939812597.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/96703868387.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/heterogeneous_catalysis_and_solid_catalysts.pdf
    • https://static.usrfiles.com/ugd/b8c837_f04ff70ac2c7404db8eb1046660cbc7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a7583e1a184d6381f80099e6a53d5e.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_60e10c92578c48c18d307f4682a31f50.pdf
    • https://static.usrfiles.com/ugd/e2f197_4bf773dd0f2c4618afb75ee081d22031.pdf
    • https://static.usrfiles.com/ugd/b8c837_3333b93d602148d5a90ff195de6b3302.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d11b6247966490d9a33fece389ace91.pdf
    • https://static.usrfiles.com/ugd/edb4a7_8bbf7aeea2af4455a1723007370d1f6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7512fdf9bc5245d49cfd1570251fa20f.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/19761908775.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/48641975201.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/lezibizarimajazixemaroba.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005013.bin
f7d887df2899e81c66a2ed82417c0f9741d09f694d9662ecf658ae9a8f413e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5013 5692 bytes
font_01_sfnt_off00006371.bin
ba05fcbc6b36962f7afce1d8b26627930212ac32d49d66b02e6709f22082f1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 9104 bytes

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