Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f673bc7a3798a5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 23:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0000f1bfc4b56761cdd0b1aba436fccd SHA-1: e58693634ea7fd67cb345ad0dcae28c62b55c6b3 SHA-256: 26f673bc7a3798a57dd8b8ef592dfbc7f704e70c80f754909cd64b662b365008
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily garbled, contains keywords like 'Audacity free windows' and a URL that matches the malicious redirector, suggesting a lure for users searching for software. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the 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.com/wix?keyword=audacity+free++windows
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/mortal_kombat_babality.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4344/files/26674815999.pdf
    • https://cdn.shopify.com/s/files/1/0435/0899/0116/files/byomkesh_bakshi_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/descargar_6_claves_para_aprender_ingls_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/11th_bio_zoology_practical_manual_english_medium.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2e05f65027e49acbad4d1839524116b.pdf
    • https://static.usrfiles.com/ugd/aef5b7_892842357c1f499089bc6c9554a3eb57.pdf
    • https://static.usrfiles.com/ugd/ace02d_8528a2b41f124aff98be863eba91c5f8.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/88667955135.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/boishakhi_mela_song.pdf
    • https://static.usrfiles.com/ugd/f1780b_fc57d320fb304aabb349792e20ab8fa8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b818b6c3533a4e4dbe5128b69367856b.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_off00005e9d.bin
4670a71ab8ba66bf744512cc764453bab8bb3e90b32294525d708c64fe205a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9D 5168 bytes
font_01_sfnt_off00007059.bin
2ad0492de21cfd4e6e6d9c231a4a9f4719290554b1d972b7d088819327c25540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 9776 bytes

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