Malicious PDF — malware analysis report

Static analysis result for SHA-256 42aab0d69b6b0c3f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 01:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b780594e142cca24c78f6ec1b3f80efb SHA-1: 2f6e34d15e288139bc062cd2b90fe6f4e20b116c SHA-256: 42aab0d69b6b0c3f0b25d2dfacefcaffa1d97d76856db24ac40233915b7377ee
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=p7h55-+m+lx'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=p7h55-+m+lx
    • https://static.usrfiles.com/ugd/2f3ac6_b7f88bff7d5f4f5780219175b316c577.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_79e9abbd7d86454990df4bf2ae834083.pdf
    • https://static.usrfiles.com/ugd/1f6d71_53301b4c32044407ab13b10ab2ac19d2.pdf
    • https://static.usrfiles.com/ugd/850f07_5108242946454c6ba7baf6783549e93d.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/92394905323.pdf
    • https://cdn.shopify.com/s/files/1/0446/6225/9865/files/english_grammar_easy_way_to_learn_pd.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/74871687877.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f7f3190808d45b599d585a6502508f3.pdf
    • https://static.usrfiles.com/ugd/253000_e0e66922212e439e85e4ffdb9f7dced4.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_fc32f4baedd549e3a6569f77f02594d1.pdf
    • https://static.usrfiles.com/ugd/704566_5c83778283cc4c6aa09c519207d9b017.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_6c87a63d36c74108a536623159dbdcda.pdf
    • https://static.usrfiles.com/ugd/b8c837_c670a4d942f1437aa4799e6cf99f1d22.pdf
    • https://static.usrfiles.com/ugd/599026_699eb0afc58e4f6fbfb1838f5e116b95.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008e44.bin
b1dbc69f49fcfe26ecfd967fb2d239180674a423e93e7b59032cd848c8336376		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8E44 17384 bytes
font_00_sfnt_off00005280.bin
f3e1cc389482f3306fe5ac9a213e97f876d3308445b3dc97035da7a864f64045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5280 4744 bytes
font_01_sfnt_off000062a0.bin
99e3453e34e2d89b4e76cc7816b3648ab9e3dee0c4e65e3fadb856b6287070c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 13780 bytes

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