Malicious PDF — malware analysis report

Static analysis result for SHA-256 34206e3e93590b3a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-31 06:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 558984f65e06c48fa8766869217a2fca SHA-1: bcb68977a57c7170e6d500418ecf18b96e01c9a1 SHA-256: 34206e3e93590b3aa45dcb267d4a58a9c7fe8fc05f66e03353f1276e0796c843
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though partially garbled, contains text suggesting a payment or rental notice, reinforcing the lure. The embedded link farm likely serves to obscure the ultimate destination and potentially distribute the malicious payload across multiple benign-looking domains.

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/wix?keyword=t%25C3%25A0i+s%25E1%25BA%25A3n+cho+thu%25C3%25AA+kh%25C3%25A1ch+ohio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0adedf_f24daa99b01b4d76b55b638cd4dded5f.pdf
    • https://static.usrfiles.com/ugd/0bcf16_5d9a7c95c052494984d9b773d01d1b85.pdf
    • https://static.usrfiles.com/ugd/0aab01_b05558f1c5334f25b6ca36b05c4be34a.pdf
    • https://static.usrfiles.com/ugd/3f4b99_3324a569cfc345c8838a525fea26cfd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_765281d8729b4e3083c224be80ecbd8c.pdf
    • https://static.usrfiles.com/ugd/b5472a_6abcbed67fe44fc6a975a489711ff5fd.pdf
    • https://static.usrfiles.com/ugd/f55bec_778295611d9e45f49017645de2b8d57a.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/60048371333.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/lizuzowib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/drake_controlla_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/85738760539.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/xinudovapexupirugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/zozizimor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/27960251587.pdf
    • https://cdn.shopify.com/s/files/1/0435/1138/2170/files/80573831696.pdf
    • https://cdn.shopify.com/s/files/1/0464/4896/7848/files/how_yall_youse_and_you_guys_talk.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/50749634668.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669b.bin
f02e6d26b42a05835c7f3caee275da9cbb4f2877f5c1ebba60a7dfdceebd6baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5448 bytes
font_01_sfnt_off000077a7.bin
b06fe027d036db66b4a693a89cd6ec8cdb5b2cefa77e8c0ad216e1945699e168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 21788 bytes

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