Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8baf0e6499b1432…

MALICIOUS

PDF

56.3 KB Created: 2020-09-01 03:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 189d16ea6c41d97df39d01db2ed6b8db SHA-1: 452f2bde78b5ee9f0a64672254b2d6e6d3370e98 SHA-256: d8baf0e6499b1432bf2b07a44bc43c0a03c42e9568d9e2300e1b0d0b76573a36
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=new+technology+in+automobile+engineering+pdf'. This URL is presented within the document body, suggesting a social engineering tactic to trick the user into clicking the link. The ML classifier also strongly indicated maliciousness.

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=new+technology+in+automobile+engineering+pdf
    • https://static.usrfiles.com/ugd/e3ed1f_9e800e09a04e4de8a3a2b8b1a5ed29f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4d4ae52d7941bdb4a5f76737f27e19.pdf
    • https://static.usrfiles.com/ugd/cd79e3_c9dcbb484573497eb8d3a4a3a9ebd4d2.pdf
    • https://static.usrfiles.com/ugd/269bb8_beba3de3b1bb412186ce56f6ff0f7864.pdf
    • https://static.usrfiles.com/ugd/b8c837_fad2644dde6c416dadeb2f417ec578bd.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/49879053019.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/inventory_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/estadistica_parametrica_y_no_paramet.pdf
    • https://cdn.shopify.com/s/files/1/0467/5744/5795/files/an_economic_growth_model_explains.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/92457507882.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/bejozozotasej.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_off00009dbd.bin
163c048ec5abe1a6f2e16241bd0f0c8abe55df2b9bc89454060151c4137926b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBD 5692 bytes
font_01_sfnt_off0000b10a.bin
0d4648f1907ce0b0e040670614b434041526e8c4ba13868230c7017fd2b9b65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB10A 10312 bytes

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