Malicious PDF — malware analysis report

Static analysis result for SHA-256 465f7e6cae9b9125…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 23:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56d7b748f8e8da7de9c38c73f91c227 SHA-1: 94d9c3425eb34cd3a95ce1b2c5d9ce8b713e9b29 SHA-256: 465f7e6cae9b91258a182d0f3f1235a4a7049195d9fbb0379194483c9c6b684a
154 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains a link to the same redirector, which is disguised as a game download lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of multiple external links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent.

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=the+simpsons+road+rage+pc+game+download
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/13599442714.pdf
    • https://cdn.shopify.com/s/files/1/0433/7388/7649/files/neopixel_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/9358/1212/files/87623012816.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/80781026299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/buluromelanusef.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/kogesakedusowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/ppap_apqp_fmea.pdf
    • https://cdn.shopify.com/s/files/1/0435/6961/0907/files/rabotekigakire.pdf
    • https://cdn.shopify.com/s/files/1/0446/6167/0051/files/cervicofacial_actinomycosis.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_off00006d56.bin
cba0313500b114fee7b8c49b624d46bb8edd8c12cbc18b83907cdd710a5c61e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 5528 bytes
font_01_sfnt_off00008007.bin
856a880b02c13d63c2628fcd32e2e8c9ed291d7f545c09852b38de01802d7d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8007 10816 bytes

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