Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f159fea6525052a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 19:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 627ad2fd7af2fd8a0f4f90eb503c14a2 SHA-1: 447661b99a0042579636ad9bcfebf9691ed6d731 SHA-256: 4f159fea6525052aad133141bf4b67d82e908a08a4e2d0c154e4b8457369c330
120 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=cognitive+behaviour+modification+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0432/0156/0737/files/gilije.pdf'. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to this malicious site.

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=cognitive+behaviour+modification+pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/gilije.pdf
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/dodafile.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/filleted_accounts_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/perobaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/nejitibimapinepuko.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89d1339c7be4540bef989657ddeba12.pdf
    • https://static.usrfiles.com/ugd/96bf9d_17a4d920976b49ad80b2576101645296.pdf
    • https://static.usrfiles.com/ugd/98857b_2a181aa7a8fd4549ae3ca40498e344f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51b578cdb8a458c946aa13a31110476.pdf
    • https://cdn.shopify.com/s/files/1/0432/2014/0191/files/class_12th_biology_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/pdf_naar_word_mac_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/80008404196.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/rescission_of_contract_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/12182570824.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/lujeguga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/kuvadegonum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/wedding_ceremony_program_template.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_off0000637e.bin
840cc049971fd1abd55ec30ec65fd970b006808ef4bd26db3633494b2ab2493b
pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 5464 bytes
font_01_sfnt_off000075f4.bin
695975f6d377e159b84e3fb22da4254fc8ce53347bb92290eca3de784ce738b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 10100 bytes