Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00a5f8ba5821f61…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 21:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a3ae5fcb2c5b369a4145b5901e40d3c SHA-1: 0f0eba306188e57974ffcbb57f2d6f528791940a SHA-256: b00a5f8ba5821f61dd72b8de60502549a5e564c2bc485a6c7038547337dc79a1
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, a technique often used for SEO spam or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. 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.com/wix?keyword=bed+bath+and+beyond+canada+sheet+sets
    • https://static.usrfiles.com/ugd/83d902_e2a08b05f96f449c8ff60dd08114950f.pdf
    • https://static.usrfiles.com/ugd/51c472_4ba5ae7ffd0e465ab463e98fceff8b92.pdf
    • https://static.usrfiles.com/ugd/8b2c09_34825ff983524b20b817529539de2436.pdf
    • https://static.usrfiles.com/ugd/8ab72e_a2230716a3734afd95aed4550f2cb062.pdf
    • https://static.usrfiles.com/ugd/60933b_2e30d4f3f4e24db8afb40041a64234f2.pdf
    • https://static.usrfiles.com/ugd/89064d_0f5182563ed242569445960a90b72794.pdf
    • https://cdn.shopify.com/s/files/1/0428/7142/3135/files/sociology_project_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9893/0341/files/introduccin_a_la_investigacin_de_operaciones_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/vobosadoxuwaxitub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/ct_gov_dmv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/18358474149.pdf
    • https://static.usrfiles.com/ugd/97493d_cdb95f493ec54e90a578f6407f9b5d31.pdf
    • https://static.usrfiles.com/ugd/d43733_05801bfb22ad4dad931204a7382ab46d.pdf
    • https://static.usrfiles.com/ugd/f967ac_6e31c6915ee741ff95b19176b7beae94.pdf
    • https://static.usrfiles.com/ugd/b8c837_a41edc31688c40e2b1253604609abc88.pdf
    • https://static.usrfiles.com/ugd/538d67_5407018bd50445aa8be47821a77f4823.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_off000061cd.bin
1a736483e659b9698aaac44728ef8763e4e52c61e7aba1a69d8fea8791124c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5188 bytes
font_01_sfnt_off0000737c.bin
589a6dcaa49c77903d4eb7f16968c7dccd3855fba40d3c9600b2e089d0785e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 10812 bytes

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