Malicious PDF — malware analysis report

Static analysis result for SHA-256 2758857f0d5157ca…

MALICIOUS

PDF

62.4 KB Created: 2020-08-08 08:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf41283cdea1545f98b5702b47b4036 SHA-1: 653e3bb87f4c303b83c898f9f93ef0cc83dd2028 SHA-256: 2758857f0d5157cadbf2e343a18b2c8e2e22e5c9bca9c34a785ef5b743ca140d
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 likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same keyword as the redirector URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for malicious content.

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=benign+intracranial+hypertension+pdf
    • http://files.macierenae.com/uploads/1/3/2/7/132740352/tojinazar.pdf
    • http://files.malahidelions.com/uploads/1/3/0/7/130740255/7c26e.pdf
    • http://files.driftriders.org/uploads/1/3/1/3/131378899/sepulikasud_pimijerufirik_lukuxosemutufoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/kindle_epub_mobi_or.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/gipaneketuzirizere.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/keroses.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/votedad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/58356172114.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/63027501598.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/28295768224.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/xujivetidokusaterepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/metojulisuzusopavoxukupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/mutamepugileberakokubix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/62154616321.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a996.bin
747f957078ac0164367289a9ddc506c8271efc1eaff4dd52f858c5930fdc999a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA996 5356 bytes
font_01_sfnt_off0000bbc4.bin
83df89642c1d63db2766080a1a81401dae810937e32e2f40d66ae5f88423e77b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC4 10228 bytes
font_02_sfnt_off0000deb2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 4324 bytes

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