Malicious PDF — malware analysis report

Static analysis result for SHA-256 63daaa6e0ea5921f…

MALICIOUS

PDF

48.7 KB Created: 2020-07-20 15:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5886c2adb5296efab72e270a4723c7dc SHA-1: fd3cef559a112500a4a424c09db4b06bd78e2a42 SHA-256: 63daaa6e0ea5921fc77d48149a4f2e5a810a811f6e6b0fb3313c63c77adbadbb
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'quantitative genetics pdf free download'. The primary IOC is the malicious redirector URL used in the lure.

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=quantitative+genetics+pdf+free+download
    • http://files.jjhorseranch.com/uploads/1/3/0/7/130776082/tibakametebiz_gujibakanupujo.pdf
    • http://files.vanbarfitness.com/uploads/1/3/1/8/131859993/xibunusowijo.pdf
    • http://files.fitnessfactory1.com/uploads/1/3/0/7/130739567/3499249.pdf
    • http://files.liftyoureyesgallery.com/uploads/1/3/2/6/132695244/1441293.pdf
    • http://files.asafcircus.com/uploads/1/3/0/7/130775977/widusesifiz_dumemedokamed_sajejizatitun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3510/files/26192343491.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/bokemegilezitakozozalaled.pdf
    • https://kunamazimav.files.wordpress.com/2020/07/99619542987.pdf
    • https://jusuxifigig.files.wordpress.com/2020/06/benonusobekejow.pdf
    • https://bazaroguj.files.wordpress.com/2020/07/lofanel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/zelatareludofesamo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/12546510589.pdf
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/18056302601.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/81721991357.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/81098720815.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/37582645955.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/sowagadifogameworisokegog.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_off00007e20.bin
9ac79652441afabcf29e09e5c658abb7dc70472cfebe2814c3db65a1c8909287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E20 5420 bytes
font_01_sfnt_off000090b3.bin
4680c84a27d5f0ecb693deeffc1e828cb56db5d6bcbba7455170716d27e61ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B3 10716 bytes

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