Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa383888c5f2a44…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 05:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c993395dfd85aa678734625e1614d48 SHA-1: b21070b3d4a6b3e5394e87520645e9dbdfb52d25 SHA-256: efa383888c5f2a445eeb4e1a41facc5b3e32a98f3f3097efbbae233b0220d1be
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.cc/wix?keyword=seara+do+mestre+evangeliza%25C3%25A7%25C3%25A3o+espiri'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to shopify.com domains, suggesting a coordinated effort to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=seara+do+mestre+evangeliza%25C3%25A7%25C3%25A3o+espiri
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/jedus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/75022033100.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/29084655516.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/joniwaxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/metabolic_syndrome_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/agile_coaching_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6202/files/gogarapebasuxonoku.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/tubing_bead_roller.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/xenetisunotuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8735/files/11883341662.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/jejudejini.pdf
    • https://static.usrfiles.com/ugd/b8c837_76caa8574d1f42748c249e5a7a8c8f39.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca538b96944b4834a61426501ab22af1.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_off000062d1.bin
e0847e6bec9ce9f0dd111afbf12b99415ca3a535a4c0d89eef0c56134fb641fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5992 bytes
font_01_sfnt_off00007696.bin
4ddb4ab4bb84a2dc722eff4dbc58449f3c9fd7ecaeb744ac839ce425b810ac66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 17884 bytes

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