Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97f4b35dfad0d14…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 14:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b22d900b117836847985dbc5b08d81e3 SHA-1: 688196c507914834ff37a6adb7ae0adf2d7956e3 SHA-256: f97f4b35dfad0d141ec7ec70ea39d47441f27670b5429792f52edc4168a59eaa
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.com/pify?keyword=tryndamere+build+s6, points to known malicious redirector infrastructure. The document body itself is heavily obfuscated and contains what appears to be junk data mixed with URLs, suggesting it's designed to evade static analysis while serving the malicious links.

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=tryndamere+build+s6
    • http://files.crimsoncounseling.org/uploads/1/3/0/7/130740173/jubud-jumewekir-damuk-vufetebatiwemuw.pdf
    • http://files.sanctuarybytheseacounselingservices.com/uploads/1/3/1/4/131437978/latafugogupemisud.pdf
    • http://files.soluschristuschurch.org/uploads/1/3/1/4/131438776/vanuk-meforitumot-xuxevajirupe-xidipi.pdf
    • http://files.scratchartedinburgh.com/uploads/1/3/0/7/130740458/norefiliguwox.pdf
    • http://files.prostatecurefoundation.com/uploads/1/3/1/1/131164295/zilasikadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/nopejaxetemolobajon.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/mupoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/23428896316.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/zesukojowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/76971360346.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/tobaliwekarokobixuzike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/riwurudarixofipegebifaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/nidigavadomu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3862/files/59329905794.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/jojo_s_bizarre_adventure_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/zoviguget.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_off00006154.bin
ee28e2b012bc854ded745a3469f44ddb8cb26b153191a373cfb9dd81de59cbd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6154 5316 bytes
font_01_sfnt_off00007352.bin
e54bf925cd9fa0e68b12ea2c5824a76508c56f7857235cf65f609e9a908c384a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 14780 bytes

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