Malicious PDF — malware analysis report

Static analysis result for SHA-256 070a1561e60ae2f2…

MALICIOUS

PDF

49.5 KB Created: 2020-08-30 13:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c8362e35f27163d2997831fe1cf13f SHA-1: a464c208e0fd073b00e72c6c6e5edacfee8b545a SHA-256: 070a1561e60ae2f22adffd558f72de5276a6c9f655f9b032a30430d5f56b8f90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links designed to redirect users to malicious infrastructure, masquerading as product instructions. The primary malicious URL identified is https://ttraff.cc/wix?keyword=bosch+tassimo+instructions+vivy, which is flagged as a known malicious redirector. The document also hosts a large number of external PDF links, many of which are benign, but the overall structure suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=bosch+tassimo+instructions+vivy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9ea9b6_33af41465a1244378ad242ba992d8769.pdf
    • https://static.usrfiles.com/ugd/b8c837_4456d4e8d39a47e0b54fa0663237473a.pdf
    • https://static.usrfiles.com/ugd/b65acf_1f5074f624e74c4e8f6f0c62983932b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_24c4568d38144288a23f171b05086522.pdf
    • https://static.usrfiles.com/ugd/e4a001_b65f77d4ec674e16b4b7bc9fab246dad.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbbbc20557bc40bd85a6421d15087303.pdf
    • https://static.usrfiles.com/ugd/b8c837_edbf9d3e982a4cc5be79995981a2a573.pdf
    • https://static.usrfiles.com/ugd/48d9a1_ee586e99a08c41409434f7d8fa513337.pdf
    • https://static.usrfiles.com/ugd/5360f8_35d9bc0c57b04c979ca25e5d9de24bb7.pdf
    • https://static.usrfiles.com/ugd/4dd980_2aba53464bd34582b823618e6ae488f4.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/devesh_kumar_dhruw_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/yarn_weight_substitution_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/30872147382.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aec.bin
2e4ff902816dd0629a4222cce5b79f12c5e836b3ae4420b07b14e1f721fcb8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 5220 bytes
font_01_sfnt_off00007c8b.bin
3f3a6024bab2567097519325c7d7bbe50437b58883f50edd7522f48acb146957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 9912 bytes
font_02_sfnt_off00009eb4.bin
8218a6c33d13394644c1b4273ca0e62ba14d813076d42e8ef3318138cd329df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB4 17588 bytes

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