Malicious PDF — malware analysis report

Static analysis result for SHA-256 287e72c137e288aa…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 02:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ef55c7896c2ae97c2fe013623b951e SHA-1: e12742f7cdefa2ca6a0e088ebc339bcd587064d9 SHA-256: 287e72c137e288aace11f0e8b87098d9dd0f41f34c695bd2b0374ed84f7b37ee
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a keyword related to school uniforms, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious destination. 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.cc/pify?keyword=west+boldon+primary+school+uniform In PDF document text
    • http://bujugu.sweetdsignsbydawn.com/uploads/1/3/2/7/132710712/kemanuzu.pdfIn PDF document text
    • http://files.bg-osteopaths.co.uk/uploads/1/3/1/3/131383297/6490766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/94013061266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/vamejukigujidagudokitizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/cashflow_101_game_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/77535881355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3371/3050/files/bifrost_maya_2014_plugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/convert_files_to_word_format_docx_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/internal_audit_strategic_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/muvimepesunopugebalopobil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/88189335980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/mastermathmentor_exponential_and_logarithmic_functions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/lajokogedirolitugusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/air_force_model_question_paper_with_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006512.bin
ac6dd83c412b45d149932507eb2aa8ebc5db998c6a853186369058211ecb8934
pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 5652 bytes
font_01_sfnt_off0000781a.bin
408f2a0130ba7cb1f53275d79b942ced8c38de53e523856ecfd446ca8dab91ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10000 bytes