Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb056a649538653…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 07:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7136c8dbadc66e6de058504daad1cd4 SHA-1: e7a02d66aab83f308cdda0e68232fa0b145c7880 SHA-256: 2fb056a649538653f785be6a5ea436017a347fdf5be4690b9e9e3bff54d4a80f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Celtic rosenborg tv guide' and includes the malicious URL, suggesting a lure. The presence of many external PDF links, some hosted on Shopify, indicates a link farm strategy, likely to obscure the ultimate destination. 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=celtic+rosenborg+tv+guide
    • http://files.lorifurbush.com/uploads/1/3/0/8/130814666/fefokapafiwuf.pdf
    • http://files.grandmastersfineart.com/uploads/1/3/1/6/131606652/vijabisen_tamirobawenivol_podomidavelibo.pdf
    • http://files.lakegenevapsychologist.com/uploads/1/3/1/8/131857847/8398308.pdf
    • http://wolana.izzysfrozenyogurtandicecreamnh.com/uploads/1/3/0/7/130739777/1999183.pdf
    • http://vosab.doodlebugblessingsgoldendoodles.com/uploads/1/3/2/6/132681579/2359640c5.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/warega.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/31060466983.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/latin_america_landforms_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/tamibazenizetegatefisixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/90128512528.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/sazaxugadosiravila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/87646060665.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/bluford_series_the_bully_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/1201/2701/files/14818448723.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/anti_corruption_report.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_off00006a68.bin
09f95d5f52dbff8f511f847fb1545b9c51b2c7c8160ebcd439a4a762eba34fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 5000 bytes
font_01_sfnt_off00007b72.bin
60f67c345f01fd58b7902b29296d64bbc4ed99cdec897cf386f1f1ed5c71fd27
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B72 10160 bytes