Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ae3d82c689eea6…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 21:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74281af4c8f7b7dbbde4e7e335adeb2b SHA-1: 27fae5a4baa1d3c830051fdfe11bc0a344eb6a63 SHA-256: 21ae3d82c689eea68c327519f54ed4dfd536ab5b46024b248c63b30b43f82d0b
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive prompt related to a "hangman answer" and includes numerous links. One of these links, 'https://ttraff.com/pify?keyword=co_+_t+d__+c_+l_+hangman+answer', is identified as a malicious redirector. The file also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is flagged as a link farm. This suggests a social engineering attack aimed at redirecting users to malicious sites.

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.com/pify?keyword=co_+_t+d__+c_+l_+hangman+answer
    • https://static.usrfiles.com/ugd/bdeb4c_5c38294279e4470abf271b522124005f.pdf
    • https://static.usrfiles.com/ugd/b8c837_643fd96829174a5bada6054e7027b46e.pdf
    • https://static.usrfiles.com/ugd/1f5cef_a1438c41aaa34410887dbed592004464.pdf
    • https://static.usrfiles.com/ugd/b8c837_311d9ff710d54d5ea14d805a016b4f54.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ec213a98f14c28b4fa32fa1541f7a7.pdf
    • https://static.usrfiles.com/ugd/e3834b_fd724e6d7a844a4eb9c153d6e299fee6.pdf
    • https://static.usrfiles.com/ugd/97368a_9f4e17a4fa754fd7942324fe458c5299.pdf
    • https://static.usrfiles.com/ugd/764aaa_ff52813501cc4c6a928e66f3ffafc615.pdf
    • https://static.usrfiles.com/ugd/1813b3_abec58ef70064bb5b1780f7dc7f613c4.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/xutijafumurufavurasojik.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/76555701232.pdf
    • https://cdn.shopify.com/s/files/1/0435/4700/0983/files/74117945521.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/11707237040.pdf
    • https://static.usrfiles.com/ugd/63022f_a963a939d6b345758222d147c8404d56.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_b7d6cc176e4c499fac74bd5762d65edb.pdf
    • https://static.usrfiles.com/ugd/79e5df_e7194526641b45889740d9fc568d0ca9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf4b339f1a4347c79ef99a2861765bba.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_off00006513.bin
63348b06c452de069ea1f117737f565bafd45c646aedaba28747536bdb5a6b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6513 5380 bytes
font_01_sfnt_off00007746.bin
97d615e920a256a6871d2ff700ceeb8295b55478f8b0c7d99b6a34bc70562deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 11056 bytes

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