Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb74f0eed43df1b6…

MALICIOUS

PDF

42.4 KB Created: 2020-09-03 09:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3e388b1dc4596351d735effa03848e SHA-1: b29aeb7a402541b1a2b4d8cda0b063ab362f1665 SHA-256: bb74f0eed43df1b67ab7416242b628f12524e4f681b8c9b5c213091ffa1dfa5a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO poisoning or link farm attacks. One of the primary links, 'https://ttraff.club/wix?keyword=chapter+two+play+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=chapter+two+play+pdf
    • https://static.usrfiles.com/ugd/b85eb0_3e603e2c43aa4a1bb805ddc7327ec8ec.pdf
    • https://static.usrfiles.com/ugd/314c35_c3e9f2ac308947b0956feef1e7758751.pdf
    • https://static.usrfiles.com/ugd/b8c837_f813b776b3b2450196a554948a86c5eb.pdf
    • https://static.usrfiles.com/ugd/5be868_c1087175ebd345b4b3a8f50bac8d93a2.pdf
    • https://static.usrfiles.com/ugd/bf0735_5fdf716f8f294fc7a7d271198ba6678a.pdf
    • https://static.usrfiles.com/ugd/d94ae5_c097a7689985400d92a9b6a194fc4783.pdf
    • https://static.usrfiles.com/ugd/1decf9_7730403f288642c4b14f4cdab3928f2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dff851d7e044c5e9933dc633b0d4bea.pdf
    • https://static.usrfiles.com/ugd/79e0dc_52e14b0df2f64bc788e215ce2b712f3f.pdf
    • https://static.usrfiles.com/ugd/041b56_78c20ba25a9b446281addc89b9afc7c4.pdf
    • https://static.usrfiles.com/ugd/21e6f2_351f68f6066d426094fd730f66cd216d.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/que_es_un_ensayo_descriptivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2155/6117/files/tavatixonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/mcgraw_hill_education_algebra_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/6770186688.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_off000068f4.bin
debed1068688e32d2259ba856a319867ec7c9760ea3341e2764bd52cae4f365f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5052 bytes
font_01_sfnt_off00007a31.bin
83e2843c4cc2695ed14f45e28a6e194c5f6420b7b09170fbb2286125bbd9df44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A31 10212 bytes

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