Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ded3bcbb0eb4f4…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 14:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27848e9113e4457d01e7325fe8d27acc SHA-1: 249c2c6f15f06f6c93e82dcb48de25af89333c99 SHA-256: 16ded3bcbb0eb4f48e311a22758cd23952664a53182bd269c28b35c35943c266
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to manipulate search engine results or distribute content through a large number of sites. No scripts were extracted from this sample.

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/pify?keyword=ccps+guidelines+for+auditing+process+safety+management+systems+pdf
    • http://files.brainwavesummer.com/uploads/1/3/2/7/132740291/6966055.pdf
    • http://files.risikat.com/uploads/1/3/2/6/132696112/053a0f59a.pdf
    • http://files.blacksheepdivision.org/uploads/1/3/1/4/131452958/b1cc4a60864495.pdf
    • http://gomijosed.wadokaisouthwest.com/uploads/1/3/1/4/131407227/74cf8229a4f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/89662108804.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/subarray_product_less_than_k.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/zupagazemetut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/nothing_else_matters_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/54795360911.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/12348140399.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1014/files/coca_cola_font_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7968/files/pikigeridebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/26078830524.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/towijufuzidov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/63274999478.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/xuwubelonok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006438.bin
81667357016da3983bc89acb7e6129104b1d4553a902f6b2abf10812104c9bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6438 5484 bytes
font_01_sfnt_off000076c7.bin
57eecfbdb1de57572f89fd5fd3e36865165857a963c72ccc3ccf5d0a16e7ce3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C7 10324 bytes
font_02_sfnt_off00009a1c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1C 4324 bytes

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