Malicious PDF — malware analysis report

Static analysis result for SHA-256 a164b4975b030829…

MALICIOUS

PDF

32.3 KB Created: 2020-08-16 21:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a009e4d09e421c8c8d35584d1298db80 SHA-1: dd1f2fa6645538d5029dea45c4198b6883b244ce SHA-256: a164b4975b030829bed076ddf8b124acd9ca71101f96e9dfe0bd100625eaa223
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Bumblebee transformer costume', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious IOC is the redirector URL, which likely leads to further 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.cc/pify?keyword=bumblebee+transformer+costume
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdf
    • http://files.lightmybottles.com/uploads/1/3/0/8/130814877/bosemakokawefodigoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/adding_and_subtracting_fractions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/vuresaserufezuvibev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/pdf_file_compressor_to_1mb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/insert_header_in_excel_on_all_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/free_printable_food_diary_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/allowances_exempt_from_income_tax_u_s_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/losotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/tamil_hd_movie_website_name_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7420/files/ahmednagar_police_bharti_2020_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/98939001414.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_off000043d0.bin
ed627cea8151a94bac1e17336da627897b94f1ef348ca35f6d4e7a0800bddc9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43D0 5216 bytes
font_01_sfnt_off00005571.bin
973e4d7f11f8bbb47ce3f99dc6cb6dde331c02a434ad998dee1d177748385d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5571 9160 bytes

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