Malicious PDF — malware analysis report

Static analysis result for SHA-256 5023ac69c17a50cc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 02:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ad069ffb24a9910d3c7a6b083bf5d9 SHA-1: 7f06c8d31e9aeef14ba5987c821a98e8b3888862 SHA-256: 5023ac69c17a50cccd9a840c1d18e0e187661ce20dc10c9aa2d3f07e625245dd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=bobcat+t300+service+manual+free'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

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.ru/wix?keyword=bobcat+t300+service+manual+free
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/leluguwajefufexogo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0614/files/black_sabbath_nib_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/voragugefavinuxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/12652703999.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/nalipevinewiguran.pdf
    • https://cdn.shopify.com/s/files/1/0448/1577/7954/files/que_es_un_enlace_glucosidico.pdf
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/receipt_template_for_car_sale_australia.pdf
    • https://cdn.shopify.com/s/files/1/0456/8501/4687/files/55718799936.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/gezujo.pdf
    • https://static.usrfiles.com/ugd/9b33c5_0f194bcd89554e70bfbe7760503784f7.pdf
    • https://static.usrfiles.com/ugd/c1de29_e91c46a881eb40f0a8f689d09538dd3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_28fac90fa32549fab076ee66f0d9fae5.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_off0000576b.bin
d9b257e6070bd0b36792eb0bba77c8ef55be61759b636283ac6789e9acabcae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576B 5464 bytes
font_01_sfnt_off000069d9.bin
d036981bc263ab1219c0dd76cc0240e8d6dfb03d51c9f4811136ab273ad7b676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 9672 bytes
font_02_sfnt_off00008ae5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE5 4324 bytes

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