Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb65b9d41beb766…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 18:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ad53013241efa4012288fed378a2b5 SHA-1: e928a3508ce09a67370370fc72d6460e6766ba0a SHA-256: 7fb65b9d41beb766f32a591d928457a130ab01c9c09bdbf924e26835f8e0bc2a
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, with a critical heuristic firing indicating it's a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=realismo+magico+caracteristicas+pdf, which is a known redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a tactic to manipulate search engine results or distribute further 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.cc/pify?keyword=realismo+magico+caracteristicas+pdf
    • http://files.rooznote.com/uploads/1/3/0/7/130776166/vugorirunak-rafabe.pdf
    • http://files.nickosharizanos.com/uploads/1/3/0/7/130739459/6741765.pdf
    • http://naregujok.cpcfamilies.org/uploads/1/3/1/4/131452883/nexojukojoruda.pdf
    • http://files.theplaytimecompany.co.uk/uploads/1/3/1/6/131606069/sokupu-davepejor.pdf
    • http://files.moglisphotos.com/uploads/1/3/1/8/131856046/zegefexeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/wedojiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/gedodununizirufirad.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/52681660242.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/64587931603.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/lullaby_of_birdland_lead_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/71428691357.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/average_velocity_and_instantaneous_velocity.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/1172392914.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/pulepopirim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/sewipivekawagofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/how_to_install_git_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/bingo_games_vegas_world.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_off00007097.bin
12274d83acf69f2b9acc5f6ee86b43b63eaaf53f25cb11fbed1dc91a237bbc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 5484 bytes
font_01_sfnt_off00008330.bin
de721bf8b220c221488f4cd5169ed3fac4ce79f864cb5d39c857267cdc558a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8330 10040 bytes

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