Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1859cc34f9187ff…

MALICIOUS

PDF

44.7 KB Created: 2020-09-12 13:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068f2658f47d40cf26df70147823773e SHA-1: bf6f21cd3e10aa81023de3c9beaecd6acd2148e8 SHA-256: f1859cc34f9187ff77a2b5697a2059469c581a3a3502c4e47ad869e1ffbdd8d9
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.me' which is disguised as a Fitbit manual search result. This indicates a likely phishing or malware delivery attempt. The PDF also features a link farm, suggesting SEO manipulation to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=fitbit+flex+manual+sleep+mode
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/20284530191.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/carbazole_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/kawaxinalakuxipajavufanir.pdf
    • https://cdn.shopify.com/s/files/1/0447/9575/6693/files/antique_olive_font_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/all_barbie_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0454/1464/5928/files/mipa_cc9.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/amharic_bible.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_539c3470ab5a44679e52ea93d62f0040.pdf
    • https://static.usrfiles.com/ugd/ed8107_d356d551b2ae4c9981280d0ae4cb5ad1.pdf
    • https://static.usrfiles.com/ugd/10e3af_d497be3509b846d3b9678f95d512b246.pdf
    • https://static.usrfiles.com/ugd/110ef3_2ac891db6c484001bd9e85f6bded1d32.pdf
    • https://static.usrfiles.com/ugd/c6ac46_792a7ff86af74f4285b72345d7d542fd.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/anemometer_digital.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/83249655418.pdf
    • https://cdn.shopify.com/s/files/1/0440/5005/5318/files/japan_travel_guide_blogger.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_off00007083.bin
782c08bcfdf0b7874fdd434ab5b3717b8e1eba16e6d0a9bad8e19f5e8c5ee4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7083 5252 bytes
font_01_sfnt_off00008253.bin
bd212de5f0099146f2f8ccd1b8ef8a8b709ff9caca81a262e6d3410302c31dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 10400 bytes

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