Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cde91786d274765…

MALICIOUS

PDF

44.0 KB Created: 2020-10-17 02:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f76773fcaf10941c835ca84943076c9 SHA-1: 367096e5c1da7e9a256a06ca607c77b7a1cfb2e6 SHA-256: 3cde91786d27476552d550b554c87ef554563cee7a0517879a0005f5a7a540b6
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, which is also present in the document body. This link, 'https://ttraff.me/123?keyword=bailey+and+love+essential+clinical+anatomy+pdf', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to manipulate search engine results or distribute malicious content through seemingly benign 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.me/123?keyword=bailey+and+love+essential+clinical+anatomy+pdf
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fezoji.pdf
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/2140855.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f873bf95ab4c.pdf
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871791df8cd.pdf
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8a21877627c.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f88effcdbf81.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8956d774796.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f88104e58b5c.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8724576e0ff.pdf
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f892ed84e460.pdf
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f8a1e378576b.pdf
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f87463e5d53d.pdf
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8a17b533990.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f88b81a6c7d5.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/legend_of_zelda_rom_hack_download.pdf
    • https://cdn.shopify.com/s/files/1/0484/6095/5798/files/35th_anniversary_gift_jade.pdf
    • https://cdn.shopify.com/s/files/1/0477/3937/1676/files/el_amor_debe_ser_firme_james_dobson.pdf
    • https://cdn.shopify.com/s/files/1/0485/2413/2514/files/74754232488.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/zonorutebevelibim.pdf
    • https://uploads.strikinglycdn.com/files/d5cfa6aa-5746-4033-861c-c9c1fc779d73/la_bruja_maruja_cancion_infantil_mar.pdf
    • https://uploads.strikinglycdn.com/files/d471bdfc-9ed2-4cbd-8a45-a560106047ec/45895776285.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_off000069c9.bin
3dc43b66553487b783b98f392576a2103767b0a9100f60fe911229ddcd8f33d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 5416 bytes
font_01_sfnt_off00007c37.bin
737e9349b0498d29c3168cb7bb3e913e55cfe50d752987394145d8d34650f7f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 10652 bytes