Malicious PDF — malware analysis report

Static analysis result for SHA-256 7340500f889fb3d1…

MALICIOUS

PDF

47.9 KB Created: 2020-08-30 10:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7603628ed64e9e27b834855e3f0a087a SHA-1: c562a9e47793e9bd49f75f95674b6821b7884c3d SHA-256: 7340500f889fb3d1f75a9787950186e4d3b4aad99462964058e6c0944c8e7aec
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to 'war thunder golden eagles hack'. The document body also contains a similar URL and a call-to-action phrase, suggesting a phishing or scam attempt. The presence of a large number of external PDF links further indicates a link farm designed to attract traffic, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=war+thunder+golden+eagles+hack+no+survey
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_59ea315c6e2249a7b59a97cd758be3dc.pdf
    • https://static.usrfiles.com/ugd/f0f215_3af5c11b88504ebfa0aed0caf62ac153.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60d65537eb74b61a35721d0745921d9.pdf
    • https://static.usrfiles.com/ugd/74a852_3b4fa44fad89493080354234e72637bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c0238f118ca4d269845d0bdfe52e7ee.pdf
    • https://cdn.shopify.com/s/files/1/0435/7750/7999/files/salmonella_biochemical_tests.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/82663846064.pdf
    • https://cdn.shopify.com/s/files/1/0432/7099/6128/files/el_cuadrante_del_flujo_del_dinero_re.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/wironufezurujatolulijomim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2659/files/georgia_administrative_procedure_act.pdf
    • https://cdn.shopify.com/s/files/1/0436/0460/7139/files/59410058227.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/fixorabunoziraxazuriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4338/0631/files/number_of_rows_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/23039523707.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/30734811358.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/3691281308.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/12261752122.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/uosteam_provocation_macro.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/79724020538.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_off00007b77.bin
60ed8e3e69f100a9b417f503c7b0ca52c2d0c00dea8c0167c117f0bb832ee676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 5440 bytes
font_01_sfnt_off00008e04.bin
2ae76340176ceb90fd3826409d4b7ddf737b368c500bf6d8958a2bc68aa13e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E04 10580 bytes

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