Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1770cd1099a9c56…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 07:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54adf8bffec357fae2639598258cb6d5 SHA-1: 05e90f8376b05f556d1b5f72023afe4bfab177e2 SHA-256: c1770cd1099a9c56e6b9225e2531a04f14b7a31bcec1e1214cb31e7e4bb12e64
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive link presented as a "Biology class 12 book pdf download". This link, "https://ttraff.cc/pify?keyword=biology+class+12+book+pdf+download", leads to a malicious redirector. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify, to potentially manipulate search engine results or distribute further malicious content. The primary intent appears to be social engineering users into clicking the malicious redirector URL.

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=biology+class+12+book+pdf+download
    • http://files.creativefinishesstudio.com/uploads/1/3/0/9/130969204/tijapofaxu-xetolegonu.pdf
    • http://files.drpaulinecheong.com/uploads/1/3/0/7/130740033/f2560adc7096e.pdf
    • http://files.patrickmcculley.com/uploads/1/3/1/1/131163878/nisuv.pdf
    • http://files.metamorphingtransformations.com/uploads/1/3/2/6/132681928/1226554.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/wekewigixut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/5173488024.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/11394184946.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/nifodakifivatiranin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/lozaniradunolutovopakawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/13644340604.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/25236665714.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1395/files/business_application_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/78954241962.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/xalemuzafog.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_off00005ec9.bin
7b06a6ab4a6580cbc0478446daa97372e74c25d368aa9fd1f98ac73798bb2435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 5860 bytes
font_01_sfnt_off000072f9.bin
9f6feff0be38ffed2f74ec10fc26b5bd6821f24caa026cf8ebae09141fb47431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 10084 bytes

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