Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc24619a89ee672d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 16:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb02c00c5e0a58105cc6a0e4060c49c0 SHA-1: 7558f7ae8dce6869056ff270379905efa37e5831 SHA-256: dc24619a89ee672d196e1dee394d122d95737c41afb18eaca9cefefd67bd6120
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to IELTS speaking topics, likely to trick users into visiting the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, further supporting a malicious intent to drive traffic to potentially harmful 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.cc/pify?keyword=ielts+speaking+topics+with+answers+part+1
    • http://files.mountainbikegreenville.com/uploads/1/3/0/7/130739688/4ed468a719.pdf
    • https://cdn.shopify.com/s/files/1/0444/4022/3911/files/michael_cembalest.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/49242729159.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/rijurewatuzirijatufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/12365038497.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/razisonetolibevedol.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/english_learning_book_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/le_royaume_betsileo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/siparegulagotopit.pdf
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/basel_iii_finalising_post_crisis_reforms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/ball_bearing_nomenclature.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_off00005b37.bin
78453f93f45b374b5128f26aecd1ccc84a8f69fae6891f3fa8ee19dabef66823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 5340 bytes
font_01_sfnt_off00006d6c.bin
6c71274604a1942a88306da2572b734582fd525ba5e9d7cfe4394384a5b2145c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 10204 bytes
font_02_sfnt_off00009048.bin
94e9ec2320e1b64897f920c438d9cca58daef586678d4396aa249c79879d90b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9048 16080 bytes

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