Malicious PDF — malware analysis report

Static analysis result for SHA-256 47be5c69496cb81a…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 15:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4f6a31f4e57d8d6f2a3aa929d1ac27 SHA-1: ff0d6e5ec1f32c444799cc978958f6d36f35b394 SHA-256: 47be5c69496cb81aa46504d23676b6aa1097acc121a6f9c6a81686e50c0be554
150 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic firing indicates a PDF redirector link to 'ttraff.club', which is known malicious infrastructure. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting it is the primary malicious payload delivery mechanism. The presence of many Shopify URLs, while individually benign, contributes to the overall SEO-like structure of the PDF, likely to improve search engine ranking for 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.club/wix?keyword=hobbies+and+leisure+activities+worksheets
    • https://cdn.shopify.com/s/files/1/0460/0253/6607/files/back_to_the_front_yugioh.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/days_of_the_week_worksheet_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/53200300497.pdf
    • https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdf
    • https://static.usrfiles.com/ugd/fef806_2ff8b824640e42af8812edfe964b2686.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/884119030.pdf
    • https://cdn.shopify.com/s/files/1/0463/8919/9003/files/emiway_bantai_khatam_new_song.pdf
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/dusirumuvezibosasaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/jituxelukarunedotolixopat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/webstorm_license_key.pdf
    • https://static.usrfiles.com/ugd/fd3290_1ac08503a2444084b5eca4058c8704bd.pdf
    • https://static.usrfiles.com/ugd/88a84f_5ead95c8d53a492684692f7fdfedec00.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_off00006ab7.bin
1a5922c0c7f05c2dab35b9910323f971ecad0565931164d556501bc530727e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 5344 bytes
font_01_sfnt_off00007ce9.bin
8c5ffc154fbc47b96023c0274d58df242afddf385a62f93b6d7535b6517c0f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE9 10380 bytes

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