Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dabaf867b4985d…

MALICIOUS

PDF

42.6 KB Created: 2020-07-31 08:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bdbf0cab7a2e5b9590047c48289c9b3 SHA-1: 2317979b997d37edfd81744ba21e07b51ace43c7 SHA-256: a2dabaf867b4985d2fb4fdab06cf6c9199d2fab91e26c3fa5a2b9efbe0b423e6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links points to 'ttraff.com', a known malicious redirector. The document body is heavily obfuscated and appears to be junk data, but the presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious content or phishing pages.

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=maclane+category+theory+pdf
    • http://files.pylkkanenconsulting.com/uploads/1/3/1/4/131412558/55176cfde938bc.pdf
    • http://files.fiberenvy.net/uploads/1/3/1/6/131606349/5094ac66492a.pdf
    • http://files.erinmakesstuff.com/uploads/1/3/1/4/131453106/jemagulo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/sutenulidoxalapejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/dukigolefigapaben.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/nazapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/pakubejumobijodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/97295260199.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/fijidodefus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4981/files/98851963019.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/99939270723.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4583/files/sikuzejobunenux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/23452975924.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/xevenozubarutu.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_off0000675e.bin
067df559a35ce573a0fe6b34e66a4b073e69035de2f53607bb948afa6e33bf8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 5084 bytes
font_01_sfnt_off000078a4.bin
f1cb825081fd6c305154a66f2e20e0afc758181b539eaa8d13e382c1dbab1445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A4 10768 bytes

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