Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ca2a3b11b33d17…

MALICIOUS

PDF

35.2 KB Created: 2020-08-31 05:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf655f39e4292800ba8ede1f2658ad79 SHA-1: f11e9e73bc347b1d5afb688137bb4553994adbb2 SHA-256: 03ca2a3b11b33d1712d46a1d02ba24fd686b5a54c83fc235e84691c03d6f885f
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/wix?keyword=drill+guide+kit', is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for a 'drill guide kit'.

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=drill+guide+kit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2556911f02764007aacff729e7e70393.pdf
    • https://static.usrfiles.com/ugd/b8c837_393e1c2745cd476e9e03f675baba9934.pdf
    • https://static.usrfiles.com/ugd/808d8c_5225ceffb4fc408f8536b41bff46ba4c.pdf
    • https://static.usrfiles.com/ugd/6da380_abadf2fada2b44e5a454dacfffc36827.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_e40060be9eff4f1e877ebdcb26a3fe60.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/3844715546.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c283542dd054f8287c4545160b60715.pdf
    • https://static.usrfiles.com/ugd/b8c837_7af82c5fcfa04d7a9313ed814819efd9.pdf
    • https://static.usrfiles.com/ugd/724fb5_41f9d4725f264402a25cc331ee560275.pdf
    • https://static.usrfiles.com/ugd/01bc73_c5c65dc7c957473a8f9b98686b31226c.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/auto_clutch_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/71675316803.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/piragufepekigorewebugo.pdf
    • https://cdn.shopify.com/s/files/1/0463/7337/2059/files/72008031095.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/65632493392.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_off00004d87.bin
0b7301e51dcf255b31baedf7fee2352dba358d18d7fcb24b93a74de3af554bc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D87 4668 bytes
font_01_sfnt_off00005d74.bin
99621a732b95bf068a3cf702a6ea893c860a728ea66bb749e0b1fef18f642c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 10152 bytes