Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bad6f064cb10fae…

MALICIOUS

PDF

38.1 KB Created: 2020-08-28 22:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50e648044eed246a7f44f89117302125 SHA-1: a7d1fc32ae53090b8b444ae72eb71bc8fb5e72c4 SHA-256: 6bad6f064cb10faec2c64adb38dc38b1f2defc1f117b0c4bb4e7fff96286ca38
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the URL and a search query, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.ru/wix?keyword=mariana+ochoa+infiel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e5d9d772ef3049d38fbfb0259d316877.pdf
    • https://static.usrfiles.com/ugd/b8c837_df0594bf9dcc475f9739fd2f7802f66a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d3eb8c9cf294477bd1a2e232c109eff.pdf
    • https://static.usrfiles.com/ugd/b8c837_88e3500285b94696bd11af5ced4611ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_65373540caa0459fa6610c8336131adb.pdf
    • https://static.usrfiles.com/ugd/b8c837_05e8dd3f692e42dd9d7b98aabf6b5b1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a1241efb154e09aea32844d3733e53.pdf
    • https://static.usrfiles.com/ugd/b8c837_a33d3cda790a4d43ba951291a5ab1ebf.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd09ff8b39dc45ffbba8d63e1564af44.pdf
    • https://cdn.shopify.com/s/files/1/0457/8974/1222/files/bikeman_performance_2019_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/stored_procedure_in_sql_server_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/milidurutebixavizenil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/judazoramubuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/bukhari_muslim_urdu.pdf
    • https://static.usrfiles.com/ugd/b8c837_111f842161c24db69370aa173d83e0fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_684aa52f1b41443ca46dc2677abb7ac2.pdf
    • https://static.usrfiles.com/ugd/b8c837_11f23be4674c416ebfa7e960a66256f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c817e777ffad4352919e13822e8f704a.pdf
    • https://static.usrfiles.com/ugd/b8c837_965648b0150f4fe2a9a34765e31ff998.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059af.bin
1d681ed7bbd74c9f6648ee1740cee5cdbd7b76cc48bd8541ffd6fd8127e7d865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AF 4796 bytes
font_01_sfnt_off000069fb.bin
0bf31fba84c1c62fc1a694aad17de48e057e36a3591df11f090cd306ee395271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 9740 bytes

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