Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ceb77207c449b1…

MALICIOUS

PDF

84.4 KB Created: 2020-08-14 19:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a56380f927b1d45f5037a37a06ee30f SHA-1: 94941b627b5074575b8a30f9d213c8755a26f351 SHA-256: 79ceb77207c449b14f723d43db18f2a9b16a23347acb58c782bce4024ea757f5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/wb?keyword=embedded%20operating%20system%20projects%20pdf'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'embedded operating system projects pdf'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially distribute malicious content or improve SEO for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=embedded%20operating%20system%20projects%20pdf
    • http://poriru.pamperandpreen.co.uk/uploads/1/3/1/3/131380213/zosipuvaposiso.pdf
    • https://cdn.shopify.com/s/files/1/0429/0828/7132/files/phorcas_letter_of_recommendation.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/audi_q5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/2465/8082/files/sowunoxejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/payroll_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/92045351804.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/zisadomaxuwifuxutod.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/lewixiwaxenawusepetavadop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/ximupatigadagarubekuxiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/bratislava_street_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/c_objective_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/le_boulanger_menu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/22105238705.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8bb.bin
70d32eb2ea1368f60f0f5424e821a12e99cafd694703c12da70488e570ea2429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5720 bytes
font_01_sfnt_off00010c15.bin
922c47e0ec4f2f735f6b739d39b64ee041b9e46e2eec7850f5ca67717fd54a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 1952 bytes
font_02_sfnt_off00011576.bin
976a6aaabd788b3e346be9e560e8cb89cbde34a55201d244cb39dbe792ded60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 14952 bytes

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