Malicious PDF — malware analysis report

Static analysis result for SHA-256 de539abfb7f599c2…

MALICIOUS

PDF

41.5 KB Created: 2020-09-08 11:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45f23638d1353d7ff99a2f2b31b46b49 SHA-1: 6827146a51ff1f7929d9bd65da38fe7bb8cf0c0a SHA-256: de539abfb7f599c2f48b05fc859bb23ece6a7a61bbef3be4d050851e725448e5
120 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 the primary indicator of malicious intent. The document body, though partially corrupted, contains the same URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm SEO tactic to improve search engine ranking for the malicious content.

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.me/wix?keyword=types+of+shapes+and+their+names+pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0438/7805/6091/files/musupuzunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/rpg_toram_online_apk_mod_money_unlimited.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/ganita.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/xijuwebanabobone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/bionaire_heater_boh2503d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/mipeje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/gegirewowudupotepo.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_b5bcf7c9bead4e809b7795fc1a2a6e12.pdf
    • https://static.usrfiles.com/ugd/c63dba_93b2e80348454683a8bd6386ccf18f7d.pdf
    • https://static.usrfiles.com/ugd/8bf3fc_9c8ec14a1c964766aef478483fa9c24d.pdf
    • https://static.usrfiles.com/ugd/912de2_53e430bcb4a24e3cb484c6f5eef716c4.pdf
    • https://static.usrfiles.com/ugd/b58d21_a532e09ea47340a18e96c623a6b0ecb7.pdf
    • https://static.usrfiles.com/ugd/49f5ef_8a4e6e20aa964fe286e67ea9ad56b7b3.pdf
    • https://static.usrfiles.com/ugd/fa6f14_71a3fc48bffe49f18f6231b117823b84.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_0344858aacf545b1bc25ecb6f63754a8.pdf
    • https://static.usrfiles.com/ugd/ca32a8_7fd4c7591fd14719a8c24bec5280a870.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_off0000636d.bin
5124972d2f150e1185ed9a8e50aa0b677d7d48b007624393202822c1fc23acf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 5300 bytes
font_01_sfnt_off00007554.bin
8570392cbfd578cc4079069fece51710b145dece6d6b43dde3c663f0b7fb6cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 10460 bytes