Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f128a0445e3b12…

MALICIOUS

PDF

46.3 KB Created: 2020-08-29 14:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7401110ef5c5618782e5e2458cbeac SHA-1: f58a5cf5d271f1c8a44e38784265f48abcdcedb1 SHA-256: c7f128a0445e3b12a0f5aafe311dd4e55de7c6253b524af5b9726130b8a1dc2e
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.cc/wix?keyword=symbolism+in+lord+of+the+flies', which is a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, detected a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The document body, though heavily obfuscated, also contains the suspicious URL.

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=symbolism+in+lord+of+the+flies
    • https://static.usrfiles.com/ugd/a18aa6_7cbfc6d675da4385b35abdb904eb22b5.pdf
    • https://static.usrfiles.com/ugd/98857b_1877c8a1c5654c0b882d6a8bc2124d19.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6ec84b551244b7a8abb88feec3d9f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_757c9fc5c97f4560912a5e2ed577693b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c02035af460e4bfc92c6e51eb577c4a0.pdf
    • https://cdn.shopify.com/s/files/1/0459/9260/7901/files/os_cuneiforme_mediale_ansatz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/3d_exporter.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/kogagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/ps4_quiz_games.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/nogudinutadekiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/rebupizegeduwuxosifexigaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/sokusivax.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/panewifode.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/82585156927.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/3d_chess_game_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0438/1114/3842/files/ohongkar_arman_alif_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb5.bin
2307e1d3dca6b2aa75bb9cd7aac645581a0a020413167753ae05ac23ebeccde9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB5 5068 bytes
font_01_sfnt_off00007cbc.bin
550d381664a898e7bfcd335c6c28576fb17d71189f2404e719c70b8e3b03d782
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 9744 bytes
font_02_sfnt_off00009e1c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1C 4324 bytes