Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55fc5ad5a30e6af…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 04:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc66d211fa22a14b31612ca3886dd4c4 SHA-1: e979ce6f0846d52bf4e061bb8ca01318b594effd SHA-256: d55fc5ad5a30e6af262ed14d26ea01e99a1f7debefa684709c3f8d3368db08a3
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=accords+quelque+chose+de+tennessee', is identified as a malicious redirector. The presence of a link farm within a small PDF suggests an attempt to distribute malicious content or lure users to malicious sites, consistent with phishing or scamming activities.

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/wix?keyword=accords+quelque+chose+de+tennessee
    • https://static.usrfiles.com/ugd/b8c837_6c30be4bc93049b48aca438e8d593c9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3c3082f7c82491f8803818f1078a616.pdf
    • https://static.usrfiles.com/ugd/0c4177_54699d125c40441984e2c4a1e7ea1dbd.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/jobasaxujamosowanekoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/effects_of_poverty.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5894/files/south_african_sign_language_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/vuperup.pdf
    • https://static.usrfiles.com/ugd/26938b_b0edbc9284da4bcfb6fac70ccd0d75e7.pdf
    • https://static.usrfiles.com/ugd/e4ff69_36cdf877254841ceb4729c8280a788fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa43847652b8432c94fa547f8ebc3882.pdf
    • https://static.usrfiles.com/ugd/06497e_960d2000592d4af38885a49f26aa5a1d.pdf
    • https://static.usrfiles.com/ugd/ae15ca_3f541af58b9a4ea9b9d87f36a2e67596.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_off00005098.bin
c2d4ba46648e90630ec04ec38d5c68e5e4a7c46c7a8dccb21f859bbc6111f36f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5098 4932 bytes
font_01_sfnt_off0000614d.bin
210bd98fbd6667b77dd123797ffbfc0937ce6209c7005e1437a638c5fe86a188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 14880 bytes

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