Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e88a73257618f5…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 06:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45dfd63cf28c7d92ce6c87c62d5ab56a SHA-1: 1458087cd7b925569ac71572ab39a24ac0b847c3 SHA-256: 94e88a73257618f5dff0ae9d3a3421b8b71a3cfd0fdb19bcaaa28fda65ae3d9d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, https://ttraff.ru/wix?keyword=clash+of+clans+town+hall+6+base, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game-related content, suggesting a lure to entice users to click the malicious links. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or scam attempt.

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.ru/wix?keyword=clash+of+clans+town+hall+6+base
    • https://static.usrfiles.com/ugd/2ca09c_246c4189332c404da804c30d7ec75e43.pdf
    • https://static.usrfiles.com/ugd/c345b0_05f0d7e7877c4fee9441c8ccbab6a02a.pdf
    • https://static.usrfiles.com/ugd/289c5e_c29bb85be02f4c20a5e884545bfd7430.pdf
    • https://static.usrfiles.com/ugd/38bf1f_4f55bb0f1b8b4d5fa955d0bff82bd9fe.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_0d326b5676344c7a83d7f4e618edd40e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d2c3bb36f12404e811aa3ac48835d09.pdf
    • https://static.usrfiles.com/ugd/432b07_ec1c417c4b5d46b5b29fee3595fa3b38.pdf
    • https://static.usrfiles.com/ugd/136d07_169a02ee11a74527b03acf6ec8abc6d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8a828d5db344b34b4a16364c9714aa7.pdf
    • https://static.usrfiles.com/ugd/63022f_f9d6b2296f054cb590dd0694f49d3324.pdf
    • https://static.usrfiles.com/ugd/d3758e_c6e54640dd86429298885649d21f167f.pdf
    • https://static.usrfiles.com/ugd/45e30f_03c8e007894c4e1e948c4c80363d1425.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/java_script_back_button.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/38125986038.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/vamuliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/17504208944.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_off00006745.bin
f2b556b001bf40d806a8143b8fb9396bc7fb4a4266780d45031fe4acb18ff80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6745 5164 bytes
font_01_sfnt_off000078e5.bin
2f8280473b39f199da107a4961fdc3fe58fa29a1840434e61eb73993d14f8e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 10168 bytes

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