Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa1a04e906535ad…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 09:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aabad7246e50a36039b2dba8cc649c63 SHA-1: 4efad9840e28949406e4488a683ec384daf4f423 SHA-256: 1fa1a04e906535adc549805632918c70c58bc1bf1da49def44334552e094c05a
152 Risk Score

Malware Insights

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

The PDF document contains a link farm and a specific malicious redirector URL disguised as interview preparation material. The primary malicious URL, https://ttraff.com/wix?keyword=introduce+yourself+in+interview+for+experienced+software+developer, is designed to redirect the user to potentially harmful content. The presence of numerous links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute malicious content.

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/wix?keyword=introduce+yourself+in+interview+for+experienced+software+developer
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/lekut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/nojapefabeteguxoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5009/0146/files/kavilisusegisasopesabonad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9694/0448/files/juwemidomalegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/bararaleken.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/rapagelufijizewezumegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/purudopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/modagofebinuzurubo.pdf
    • https://static.usrfiles.com/ugd/b8c837_714e8b6834044b54b35d2edd40928b03.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_c77acfc766d04a7184a6b4480c310eb4.pdf
    • https://static.usrfiles.com/ugd/599026_c57e0ca0e3884bfeb058951086183075.pdf
    • https://static.usrfiles.com/ugd/b8c837_321e63a406674f84b0232b4cc4073adf.pdf
    • https://static.usrfiles.com/ugd/73cb9e_020a8fb3ebe2443e9839739355583ae7.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/realtek_audio_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5745/files/arduino_servo_motor_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/918013728.pdf
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/film_avatar_bluray_720p.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_off000066ae.bin
4d955a0ec64ce14047f2c8a80ffc816d47e1f82525703f42a4932575d3ff5bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 5408 bytes
font_01_sfnt_off0000793e.bin
7b2f903b76e64a55440348207a320cb6bb7006195695679b48ab6c09320f7e64
pdf-font-stream PDF embedded font (sfnt) at offset 0x793E 10356 bytes