Malicious PDF — malware analysis report

Static analysis result for SHA-256 4549b8683067702b…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 09:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1eb3134ed2510ca8a647ae2d0bdba3f SHA-1: 3058c0a614c3ea19a06c8ceda5fb6d61ce5fa0bd SHA-256: 4549b8683067702b3a778e149a6c1beb6653164e536145fddefaf5eb4d9b5a4c
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/wix?keyword=first+earth+battalion+manual. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this document.

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=first+earth+battalion+manual
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/fidiwanejaxezupenaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/dog_sled_saga_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/cefr_language_levels.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/sumivoxibomexoxojim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/revifebitexumapuretu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/gamamemapixurakunitonate.pdf
    • https://static.usrfiles.com/ugd/b8c837_c20241a9b4ca4ef0952e996806a937c2.pdf
    • https://static.usrfiles.com/ugd/4d400c_f14efad8b52a431eb5dadbd53493bdd4.pdf
    • https://static.usrfiles.com/ugd/760101_f70fcc1962ae4c799a80fbc361ba692a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f08c09417a4dd1b0fbff13dde06744.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0407/files/faxatugapenem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/fumawerudux.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_off000059a8.bin
4c5b1a594c37df4434e8afc34aa440876232c929dfea7737b93224301e597e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A8 5020 bytes
font_01_sfnt_off00006a83.bin
f1830f942161e945a5ff1725b0111e9705af9a12eded7de27f4abe57b4d51ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 11072 bytes

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