Malicious PDF — malware analysis report

Static analysis result for SHA-256 334b757cb0ad5a16…

MALICIOUS

PDF

40.4 KB Created: 2020-08-02 15:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4897b7e682152103652a689b9b52547 SHA-1: 4f776abdb5921c073566efd7fc8c2ee2df48d57a SHA-256: 334b757cb0ad5a16c7d023645dc4252f05162a35977195449c9a0d44676a1990
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=minecraft+xp+command'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure.

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.cc/pify?keyword=minecraft+xp+command
    • http://files.serendipitygv.com/uploads/1/3/1/1/131164132/pibamuzobateg_makeguseteguzo_puvamujuvabeti_fejenedivake.pdf
    • http://files.truaesthetica.com/uploads/1/3/1/4/131406369/3111343.pdf
    • http://files.fivesaintscluster.com/uploads/1/3/0/7/130775633/puzavad.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/redefujijiduwolegepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/php_parsing_url.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/pitozilepagite.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/meridif.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/80370557680.pdf
    • https://cdn.shopify.com/s/files/1/0437/4469/0337/files/kobijinagako.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/9772557881.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemopijudesukofareran.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/lumosedokapilibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/nazibutatukul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/vaborix.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5181/files/4950429107.pdf
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/what_is_the_best_ds_emulator.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_off000062eb.bin
8b4cf40633f052b1a5e53909e95a0c32c10abcf9a9566e3adecc64b4dd389b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 5164 bytes
font_01_sfnt_off0000747c.bin
248516399e5c8ca3921ebfe9249df85e9f4d5c96a002a644d78fafcda8e3d4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 9452 bytes

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