Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a9f790def889da…

MALICIOUS

PDF

48.8 KB Created: 2020-07-27 15:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e29cea8a80ae128e2f25cdeb383a3ee SHA-1: 7c18b327c8b048f4f32aa5c1c17830463bb6fc38 SHA-256: c2a9f790def889da2b0194c529265082c756f390b853e82d4a88c301f7a52fff
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.com/pify?keyword=processus+d%2527+am%25C3%25A9lioration+continue+pdf', is identified as a malicious redirector. The presence of a large number of external links, many hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute malicious content through a network of linked documents.

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.com/pify?keyword=processus+d%2527+am%25C3%25A9lioration+continue+pdf
    • http://files.saigonapartmentcenter.com/uploads/1/3/1/4/131408353/nejumibo.pdf
    • http://files.utahdesertfoxes.net/uploads/1/3/0/8/130814205/5583126.pdf
    • http://files.hcsatl.com/uploads/1/3/1/4/131437616/4317416.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/naluzoturoxixefeziwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/21106296441.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/vulegebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/25243630686.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/bapumitofegozusozipax.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/63835883207.pdf
    • https://cdn.shopify.com/s/files/1/0435/0813/8150/files/tokenepuxevibizen.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/dojubolok.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/niketug.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/21357594210.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/muxizapurivenituju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/jozata.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/bofutosabagof.pdf
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/zalomewufavunogaf.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/
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/bapumitof

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b5e.bin
b28aa8b4ab7d1e8527c08ba924a341b3f0fe5b5f22d83e1314d98c95bbed3487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 5360 bytes
font_01_sfnt_off00008d35.bin
31b9a76fce1de062f228ff884d9cf813a559b1c62a5d4b797bdd9301f6e862d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 12160 bytes

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