Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf2780e94439294…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 21:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3930a80e987d52564a56af0f8ff5f87 SHA-1: e34d7ff4591451882847cf2719511221c65d6cca SHA-256: 9bf2780e94439294b8aa2d8f9439f720cfbca2ca96f0ab413693eee497a4dd95
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 external PDF files, indicating a link farm or SEO spam tactic. One critical heuristic identified a link to a known malicious redirector at https://ttraff.cc/wix. The ML classifier also strongly indicated maliciousness. The document body contains text related to book titles and the authoring application, suggesting a lure to disguise the malicious links.

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/wix?keyword=call+me+by+your+name+libro+espa%25C3%25B1ol
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/because_of_winn_dixie_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9036/9959/files/steep_game_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/povuw.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ab7b7970844811aeeabe7b5dd323dc.pdf
    • https://static.usrfiles.com/ugd/8e1900_791e67ddb04e47ff8990d91167265044.pdf
    • https://static.usrfiles.com/ugd/913720_2666eb88263a4a499b2b36c82e7076fb.pdf
    • https://static.usrfiles.com/ugd/cac9e4_755a4daf0fe548da82bb7e2a68a2fd8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4804ca04b30c4059b20f13b35074033c.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/27769147318.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/71430973421.pdf
    • https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d0.bin
74be5bc43d4f098b1dabbb45ebb4370d62af869016dff50423e34c16d293782c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D0 5324 bytes
font_01_sfnt_off0000658f.bin
207161aa537f838eb732d2c86905628d77313b15daba3e94c3a867c986619479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 10320 bytes

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