Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5ae28073cfc16d…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 07:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977811b1af20e150c5118176ff6ae8d9 SHA-1: cc46269e604a6edff814dfea269408b83b7f2446 SHA-256: ad5ae28073cfc16dc969aa44a59126a5f3b94186bb0c01ffcec0dfd8c1439dfa
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.club/wix?keyword=the+three+week+diet+plan+pdf'. This link is presented within the document body, disguised as a diet plan, to entice users into clicking it. The document also contains a large number of embedded links to external PDFs, many of which are hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. 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.club/wix?keyword=the+three+week+diet+plan+pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/vetusafanetu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/wisupamafitidira.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/nomutejiwabaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/the_programmers_idea_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/webulaburikasoro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/ridumugujakudegazomopumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0076/6369/files/lifofifosoku.pdf
    • https://cdn.shopify.com/s/files/1/0460/9723/6132/files/99617950494.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_6f32cbb2fcd04805b9d6f7aea7d75781.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdfd312934db4f7abe1f82318d54d2ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7453fe166aa421cb9a6576793c7d090.pdf
    • https://static.usrfiles.com/ugd/0baf77_78d818a12c2a481fa9aa966a4006e053.pdf
    • https://static.usrfiles.com/ugd/0df15e_74b35c9862ab4cf6a22fd131ff958392.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_off00006ee5.bin
19a0161113ed6e8f3df46ec348459fed48772ab301e63695b0f2386228fef5ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE5 5056 bytes
font_01_sfnt_off00008023.bin
1c8ef4482683466d3b84809c3d2df5a1742f9549e686d6bf41f62cd8a77b9ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 10364 bytes

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