Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f00708dd5e0b86b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 05:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fbab71a78e491a5d761b7bed1348dac SHA-1: 6985eee9d1172fe2724df1d9ee6ce87c9d5c7fb5 SHA-256: 3f00708dd5e0b86b822d316e29d473ff48683f078daa0351d8894ba2366b8eaa
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The presence of a 'download button' heuristic further suggests a social engineering lure to trick users into clicking the malicious link.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=mastering+the+nikon+d750
    • https://static.usrfiles.com/ugd/b8c837_5864a253692f4af3a696c5af3a04d565.pdf
    • https://static.usrfiles.com/ugd/b8c837_826862b38dcf4198a515204c0634ecba.pdf
    • https://static.usrfiles.com/ugd/cdb50c_41171c303f874c758a87c026f9bb4939.pdf
    • https://static.usrfiles.com/ugd/e1d12c_5ccca883ad544018ad73550f176b0fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f71b5057ffa44e138626de63a8734e41.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/tovevemulotesamebapaxemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/anterior_deltoid_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/cemu_shader_cache_botw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/57123872692.pdf
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/watch_les_miserables_online_free_putlockers.pdf
    • https://static.usrfiles.com/ugd/5899d5_bd4cbde6782d4c26a6a413aac77be9d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f34342e4c6f243d98bcb688bf4e93322.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/subolalafatavibiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7886/0454/files/96006204089.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/vector_banner_background_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/23156961664.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_off00006a22.bin
ac5b49b656753ecd6443eeaac369c104c794e42ccd8fce70338ca5ab5ad4cdcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 5472 bytes
font_01_sfnt_off00007cc0.bin
3696d6af075060962ce383f578a28cbdd816556e4657703e1f171364c144dac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC0 10596 bytes