Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb199516d1bfbddb…

MALICIOUS

PDF

49.5 KB Created: 2020-08-20 06:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d018e30656e5787531ae141d7d115946 SHA-1: e4838403e85ac86c4086f0a6e600a1675182da56 SHA-256: bb199516d1bfbddbf0b631a9379dc82d17cc01631e0a7928e835c42342c65924
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://ttraff.ru/pify?keyword=alegreya+font+free++ttf'. The presence of numerous SEO-optimized PDF links hosted on platforms like Shopify further indicates a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=alegreya+font+free++ttf
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdf
    • https://cdn.shopify.com/s/files/1/0454/0589/6872/files/williamson_county_tennessee_chancery_court_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/free_bootstrap_ecommerce_templates_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/49564757748.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/28958636293.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/panasonic_dect_6._0_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/smart_driver_updater.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/degexewokonedibobojate.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/dj_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005509.bin
5968bb0ad09e00019fd586141a53d46c79745aad2a057c449150249b83b9a549
pdf-font-stream PDF embedded font (sfnt) at offset 0x5509 14084 bytes
font_01_sfnt_off00008268.bin
94bc64f01feb1205650a8d6926f101c21ce2594f0b7d6f91a1a30bde2bd57b39
pdf-font-stream PDF embedded font (sfnt) at offset 0x8268 4848 bytes
font_02_sfnt_off00009301.bin
e1ed5e47c6257f7fed0380751aacba7bcc0adcad8a170bb28b661ae4242297ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 11884 bytes