Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3899be1007ab07…

MALICIOUS

PDF

44.2 KB Created: 2020-08-23 11:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b6efe67757baf2c2be2581aead77d5 SHA-1: 2cd72df4d8a40729b6663d929993eb8f92453966 SHA-256: ac3899be1007ab07475ffb13fff5dd1a09ae7f2f6deaade4417e1d6759537c03
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=reporter+killed+by+isolated+tribe'. The document body, though heavily obfuscated, also contains this URL and other PDF links hosted on cdn.shopify.com, suggesting a coordinated effort to distribute content through multiple external resources.

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.cc/pify?keyword=reporter+killed+by+isolated+tribe
    • http://files.stoddardumc.com/uploads/1/3/0/7/130776118/6980676.pdf
    • http://files.neilmccarthypoetry.com/uploads/1/3/1/1/131164236/gomelokawamox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/tanit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/99470700967.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/pdf_agama_islam_kelas_xi_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/xamiwowazikafejagazami.pdf
    • https://cdn.shopify.com/s/files/1/0445/6503/7220/files/how_to_push_existing_project_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/aws_cloudformation_lambda_code_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/cisco_ccna_networking_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/notes_of_data_communication_and_networking.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_off00006bd3.bin
77022ae50f435047bd67ad75acd2523b702fe656636acd824eba185d666adee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 5264 bytes
font_01_sfnt_off00007dc9.bin
49a904d5db4760ad1bda06987feef1ab6acf672b60ea0ef61e87a3dd1d9e8dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 11704 bytes

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