Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0d6a388aa78c79…

MALICIOUS

PDF

55.3 KB Created: 2020-08-24 02:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ecec8bee06cd429fcbcb72ab1eebb2 SHA-1: 62a1705e742b3db1bce764c2d0bbeb2ff1780559 SHA-256: 9d0d6a388aa78c79c4006ffd7b669b366ccbcf1ffc4f5a1a1e2abb6891b4c602
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, ttraff.ru, is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Maths puzzle with answer for class 9' and includes the malicious URL, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=maths+puzzle+with+answer+for+class+9
    • http://files.discoversafedriving.com/uploads/1/3/1/6/131636654/lefavoviwerod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/sakekaxuvaded.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/96003059777.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/76144420014.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/autocad_tutorial_in_amharic.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/gavotte_en_rondeau_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/iq_test_questions_with_answers_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/kruppel_engel_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/sigma_alpha_pi_scam.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_off00009a13.bin
92d31a8a6b7adcdc419f9d5b65663d311d4c1a5ccc083d2c494e052ff5550820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A13 5404 bytes
font_01_sfnt_off0000ac90.bin
acba3647b7d141d9071b14dc83b280c9dc5f37444041c1a06dc1a1f1c7f7df2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC90 10676 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.