Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62effb93d105f9…

MALICIOUS

PDF

34.3 KB Created: 2020-09-09 21:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78d3e7ada3201447e56306894e991c68 SHA-1: 8e5b8f91b3681c359e92c0ff32bad93268359841 SHA-256: fe62effb93d105f956949771c06ada967bda53b7712cd5f5e1a0e330aaadbb7e
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link leading to a redirector. The document body, though partially corrupted, suggests a lure related to an educational answer key. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute further malicious content or phishing pages. No scripts were extracted from this sample.

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.club/wix?keyword=learnwell+communicative+english+class+7+answer+key
    • http://zozod.sunandachatterjee.com/uploads/1/3/1/0/131070450/joziduvo_jusopelazevob.pdf
    • http://files.princetonclubbiggestloser.com/uploads/1/3/2/6/132696214/1779923.pdf
    • http://gazido.happylittleartstudio.com/uploads/1/3/1/4/131453574/7896999.pdf
    • https://static.usrfiles.com/ugd/05301a_3d381e9f93874d409d84f7378854bf48.pdf
    • https://static.usrfiles.com/ugd/ea78e0_73ff42079b9f46a59a60574f126eea84.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_bef42731c7cf486994313c737d33b7e4.pdf
    • https://static.usrfiles.com/ugd/bca722_c40bfd33d8f74104b2f852be9b2856fe.pdf
    • https://static.usrfiles.com/ugd/fedf23_aa4353ae9ff0423bae90c9de57e28a0b.pdf
    • https://static.usrfiles.com/ugd/44b221_9d37c8d0e8734bbd829261ca6b1451b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2b4f95692f4b54b6e802b59bb32fc5.pdf
    • https://static.usrfiles.com/ugd/ecec20_bec8791db8fb442692cc474c7f77e6d7.pdf
    • https://static.usrfiles.com/ugd/3cb6cb_5f7bf3d5045941d58f51173da208d08b.pdf
    • https://static.usrfiles.com/ugd/05900a_16ece4db20354883b401acffd4c1e428.pdf
    • https://static.usrfiles.com/ugd/eeb7bd_7a9667cd1d0b4fa5b8c05d27aa3d332b.pdf
    • https://static.usrfiles.com/ugd/7ff653_69f08117e6824303884a456f98bec8da.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_off00004832.bin
3a3de573557425a1d91f37d2c9beafe98b64c3ffc569bd33ace682acd4b7c622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4832 5552 bytes
font_01_sfnt_off00005b15.bin
c21f3049458fc3e3f71102ddb2741e8827e0ce51ab841d09ca81bea168c36366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 9664 bytes

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