Malicious PDF — malware analysis report

Static analysis result for SHA-256 490036d4dc9b5534…

MALICIOUS

PDF

50.8 KB Created: 2020-08-22 17:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d1cefb1287310a0ea5775348777c15 SHA-1: 4aceb142a80689218590cb56be737fca6bbe4a17 SHA-256: 490036d4dc9b5534de1bb95a379a991d7a81d06b1f61a2e5ba927b529b0dac51
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'dbt interpersonal effectiveness worksheets pdf' and includes the malicious URL. This suggests a social engineering attempt to trick users into clicking the link, which then redirects to potentially harmful 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/pify?keyword=dbt+interpersonal+effectiveness+worksheets+pdf
    • http://tivoxekip.mortonbaptistchurch.com/uploads/1/3/1/3/131381078/4793761.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/weduvagof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/nesukader.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/advantages_and_disadvantages_of_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/adivasi_gana_chahiye_video.pdf
    • https://cdn.shopify.com/s/files/1/0441/2804/3160/files/16675267467.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/61816689541.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/nabobekisetiziju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/cinematic_video_recording_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/cara_convert_to_word_online_gratis.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_off0000885b.bin
a951af6cf76f6d9b647afb3c1ee1bdcc3ec654a2ede23441ba84152e40e93231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885B 5596 bytes
font_01_sfnt_off00009b65.bin
047bb07de3dd2762225d62479f154f109ec7363bf2e07ebf1aecd382c44025a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B65 10296 bytes

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