Malicious PDF — malware analysis report

Static analysis result for SHA-256 6205977d06863bd8…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 08:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4223a6cc2d029fd838dcc6a5c9a575af SHA-1: e01f0a50fc7d9277766af4ad01073353d6cae856 SHA-256: 6205977d06863bd817dfd6204a9c96f036976162218f3677180440c7fec25c8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, embedding numerous URLs to external PDF documents. One of these URLs, 'https://ttraff.ru/wix?keyword=ps3+blinking+red+light+3+beeps', is flagged as malicious redirector infrastructure. This suggests the document's primary purpose is to redirect users to potentially harmful content or to engage in SEO manipulation. 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.ru/wix?keyword=ps3+blinking+red+light+3+beeps
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/30e015_168381ddce89479ba46c6acf45d98257.pdf
    • https://static.usrfiles.com/ugd/f459ea_3e39db04d9e44f57a7b97921deff3bce.pdf
    • https://static.usrfiles.com/ugd/97634b_fd7585e109804e0a843d2c2cb0342c71.pdf
    • https://static.usrfiles.com/ugd/08fe48_bad0c4b1359e410aa2a5aff4e6bce673.pdf
    • https://static.usrfiles.com/ugd/87a178_8adafe3a1eee45d496c5d731ccb2ea0b.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/saparunur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/gikovurevutimuk.pdf
    • https://static.usrfiles.com/ugd/b8c837_aca25c648844406a92e44be2b257f3c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c3c45da79249788ec0ee31b601bc21.pdf
    • https://static.usrfiles.com/ugd/be19e1_9a38093443e84398b084a7c41446567c.pdf
    • https://static.usrfiles.com/ugd/3615fb_8f8a5df118654b3887aad8dea3ac71b8.pdf
    • https://static.usrfiles.com/ugd/0e2875_5afc2c458c484b40a04f157b8a28b85e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_14170206c1c74eaca49206bd59230354.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_off00006309.bin
b6acf50cabcb711d0a8204c5840bc4fd51d28982dfd48c27e946c2ff43412708
pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5380 bytes
font_01_sfnt_off00007537.bin
9d420f811a7a0cee815f4d3e2e9ba8c2dac0497b037aef296c85afc6c470b854
pdf-font-stream PDF embedded font (sfnt) at offset 0x7537 10364 bytes