Malicious PDF — malware analysis report

Static analysis result for SHA-256 702c2a9fc9877463…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 23:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c225080c4ddb98502ed4a3350191ac11 SHA-1: d8de29f7cf2e7e9a71e9c22b07f03f76fcee4484 SHA-256: 702c2a9fc987746379d1184c3d027204dbef18721d48f8f1a2407524487c0229
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL 'https://ttraff.ru/pify?keyword=bluecoat+school+liverpool+sixth+form+open+evening' as malicious. The document body also contains a mix of seemingly legitimate content and URLs, suggesting a lure to trick users into clicking through to malicious sites.

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=bluecoat+school+liverpool+sixth+form+open+evening
    • http://norixaro.thisorthatkids.com/uploads/1/3/2/7/132741555/xojaketidepusogobo.pdf
    • http://files.atruechristian.com/uploads/1/3/1/4/131453982/kakepa.pdf
    • http://files.countryweddingsatcrookedriverfarm.com/uploads/1/3/0/8/130814531/9903601.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/associative_memory_in_neural_network.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/lefawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/que_es_el_trastorno_alimenticio.pdf
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/josupigofexonej.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/18823415813.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/nedubejawavatovonapere.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3794/files/trig_regents_june_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/11804687487.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/bauhinia_acuminata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/folekuzonag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/73826689868.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_off00005689.bin
81a8b27fdb5bdbe86fcbbc3b0cfa0e17c6d84909fa267436200e13f4c22d69b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5689 5608 bytes
font_01_sfnt_off00006980.bin
f82de295ed3f293b83cdec1f3cc07a1016b3249b9557f9871f789877da2dd048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6980 10696 bytes

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