Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe589bb4ab240ae…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 23:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1549f30b3b0051551a0fa3c12f59f2 SHA-1: 3fc3b2a29a372f03a256a5398690559662874a7e SHA-256: 0fe589bb4ab240ae3ee7ab608c3b2b188927d41e22eeafbe36d409129cdc7945
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=welcome+to+gotham+challenges+cheat+sheet`. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a title suggesting a "cheat sheet", indicating a lure to external content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=welcome+to+gotham+challenges+cheat+sheet
    • http://xedupeba.pechamps.com/uploads/1/3/0/7/130739024/sajazusagonun_mesamu_fonorewikoxe.pdf
    • http://sizep.tradewatercandles.com/uploads/1/3/1/4/131454696/maruxurukit-gitoponefake-kilera.pdf
    • http://nidekiwu.limodafinancial.com/uploads/1/3/1/4/131407406/1479336.pdf
    • http://files.sukaridesign.com/uploads/1/3/1/3/131378899/6553239.pdf
    • http://files.momsarefrommars.com/uploads/1/3/1/4/131406885/pazojesazopax-fenutezozil-bakebivug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/genestealer_cult_codex_v8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/62339737814.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/diwisunad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/d_d_artificer_revised.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/lupidibofiwigebadozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/10271536443.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/butoxalatur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/81377266063.pdf
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/57708582070.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/lalumedidinen.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/8362740434.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d3.bin
9f7d3982d6dba79a47a42730b040c7876cf070dd3e3d389f17bc0dfb6e687327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D3 4872 bytes
font_01_sfnt_off00007543.bin
18cf5b8f609423da0de973fd24f66142cf35fbec53859767ffc4242a244e7a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7543 10392 bytes
font_02_sfnt_off000098cc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CC 4324 bytes

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