Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9c349c88da2cf0…

MALICIOUS

PDF

34.8 KB Created: 2020-08-31 04:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48eb78ff72390a82abbdbcc871be5bd4 SHA-1: 7dd9766db6d29100a2618d1a44a01ed9be5968d6 SHA-256: 4d9c349c88da2cf08f9a2e2db5e73114e356be83dd91d6c9384dfca9cedda28f
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with a significant number pointing to a redirector service. The document body, though heavily obfuscated, contains text related to 'blueprint education answers class 10' and the malicious redirector URL. This suggests a social engineering attempt to trick users into clicking the link, likely to download further malware or phish for credentials.

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.link/wix?keyword=blueprint+education+answers+class+10
    • https://static.usrfiles.com/ugd/b8c837_08e756bc544b49d0911562dc1fd8912a.pdf
    • https://static.usrfiles.com/ugd/affb4a_0cabe142d2794bd3a35b284b2b27cd74.pdf
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdf
    • https://static.usrfiles.com/ugd/4dd980_1b08c01fe0c1497aa22ff7c4852ecfb2.pdf
    • https://static.usrfiles.com/ugd/3b7182_9bff7281f59b400b8d89e4ca99316d07.pdf
    • https://static.usrfiles.com/ugd/b8c837_905e9cdaf7a34985affe289ff31e9f70.pdf
    • https://static.usrfiles.com/ugd/b8c837_85c083b6b0854b4e8345a9ec73436407.pdf
    • https://static.usrfiles.com/ugd/6da380_4a826985d78046438d6278a14a681c6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab60b6c30cf4dcdba911e67216e2fb4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/alter_ego_a1.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/16444984499.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/minoxipurabunud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/2011_hyundai_sonata_manual_start.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/88498804332.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_off000049bb.bin
4036f8759525f6f3a268140170099ff496d3386bfe4ecc9a4f7955f2d92d65b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BB 5404 bytes
font_01_sfnt_off00005c33.bin
fff8f27aaf06a05811c008360c8be1c04c643514cbf57ee388a8c5031f723eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C33 9976 bytes

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