Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ad6be1e1ee9667…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 20:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c32d5cd747ae042d432f181265fe11e SHA-1: 5aac2f3568c7a8bd1d4bf12404f93823000201a7 SHA-256: d8ad6be1e1ee9667baa746a231c73f0837b86d96f69f8bc1f623d273823936e7
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=3d+games+free++for+windows+10'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download or access malicious content. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, likely to improve search engine ranking for malicious content.

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.ru/wix?keyword=3d+games+free++for+windows+10
    • https://static.usrfiles.com/ugd/80bfa9_9376f4edd4ad4b1bb250d510ed88c0a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf709f4c772486cbde61e62e75b0001.pdf
    • https://static.usrfiles.com/ugd/24853a_441e6fb703974d329ed699c1531dbdaa.pdf
    • https://static.usrfiles.com/ugd/8a419d_b57772f98f364480a6d9306ffaddb967.pdf
    • https://static.usrfiles.com/ugd/9904c2_1005b0385ec04f1491e8a6184d562059.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fad1ec8506d492aa393b8ba15f0c18a.pdf
    • https://static.usrfiles.com/ugd/353d00_54117af78e9d405daee8e59c9292f53b.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_4599e97e30d94b8982c8f20da363e677.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/17019378076.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1682/files/gospel_of_barnabas_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/7171/5993/files/fanuc_arc_mate_120ic.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/cashier_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0461/9832/5399/files/foxebodobubesol.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_off00006261.bin
49689cc64db244f37180bc934b7862af2fd71a7082d820d7af64cc0b64f59df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6261 5552 bytes
font_01_sfnt_off00007549.bin
7de2877fcc0683b332b4605507421d75f114023d3bd936dbf673ddbb13f1851d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 10616 bytes

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