Malicious PDF — malware analysis report

Static analysis result for SHA-256 300c936c84360477…

MALICIOUS

PDF

36.7 KB Created: 2020-09-18 18:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef8b93452cdb028cf4ec0ef80987d604 SHA-1: fa23a96f1724142f2747bd4fd8acf8f0865fe358 SHA-256: 300c936c843604773dacf704c9cb5b4d66b2a91e2def979f3888b244ea0135d6
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.me/wix?keyword=nise+control+systems+engineering+pdf+download'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains this same redirector URL, suggesting it is the primary malicious component.

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.me/wix?keyword=nise+control+systems+engineering+pdf+download
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/how_to_get_silk_touch_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdf
    • https://cdn.shopify.com/s/files/1/0463/1435/6896/files/53878867079.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/dagoxutogameg.pdf
    • https://0a7ef371-902b-4a7f-bd6f-a523f8c0a126.filesusr.com/ugd/0286dd_ff64943725c84e17a1fc241ef234c20d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/51314910209.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/toniba.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/wazuxakedonajuninorege.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/vokaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/types_of_customer_service_reports.pdf
    • https://2422418c-dde1-454a-a56d-27b9b9c81729.filesusr.com/ugd/b0b521_285bb830a4ad4cc9a0c12f13fa2e19cf.pdf?index=true
    • https://087bab9e-a5a7-48c7-813c-15d094402789.filesusr.com/ugd/2dbf5a_03f5b37f761f4cdf8a739d91180476bd.pdf?index=true
    • https://101c7771-d30d-4a95-a8d3-d92b6891c84a.filesusr.com/ugd/6260fe_577e728456d045d28a694e0e94541131.pdf?index=true
    • https://808d66d6-14a5-4f94-adfa-8aaecaaf005a.filesusr.com/ugd/54b9a1_14612dbb8f7e4e4083ea0961115c4fb2.pdf?index=true
    • https://375657f0-bb6a-46a3-8a38-d7394cfbeee1.filesusr.com/ugd/e42c35_5fa42e890ef1469c82a7ff18fd73bc83.pdf?index=true
    • 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_off00004e3f.bin
96202a56b51473d08dbde936b343f593c5056c8085a4ea38f9c529dc19641568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3F 5640 bytes
font_01_sfnt_off0000617e.bin
e80b1e56902346bf7240c4bc5d3661b95ec49bd0575fbcd0f4dcecf093f16824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 10692 bytes

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