Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab97dd5cd7213e0…

MALICIOUS

PDF

47.5 KB Created: 2020-07-10 00:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c31753f0907f5e06fc91b7216654128d SHA-1: 60f56a0f98467bfccdd9eed9f27154c2099a2d98 SHA-256: 0ab97dd5cd7213e082f153371f5a2c25c9897da0a70f615d7dca53b1574cf8a4
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to distribute malware or lead to phishing sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. The document body, though obfuscated, contains keywords and URLs that align with this malicious intent.

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/wb?keyword=virus%20parotiditis%20pdf
    • http://files.kristaparrpainting.com/uploads/1/3/2/3/132303307/zewik.pdf
    • http://files.ezlingual.com/uploads/1/3/1/6/131606411/07a2c042.pdf
    • http://files.livepeabody.com/uploads/1/3/0/8/130874495/42b27f.pdf
    • http://files.digitalpds.com/uploads/1/3/2/6/132696080/3800985.pdf
    • http://files.windhorsejax.com/uploads/1/3/2/6/132681336/kukoronub-jofosa-redetexogex-rifiripufo.pdf
    • http://files.bock-industries.com/uploads/1/3/0/7/130775870/fefakibisov-liwasamekale-babuf.pdf
    • http://files.brenleemcknight.com/uploads/1/3/0/8/130874237/lukisuziluva.pdf
    • http://files.vanbarfitness.com/uploads/1/3/2/8/132814448/4367679.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://benivuzejini.files.wordpress.com/2020/07/91906705191.pdf
    • https://pagapot.files.wordpress.com/2020/07/gejapopamo.pdf
    • https://tameseja.files.wordpress.com/2020/07/sozipitazurozajevabekefa.pdf
    • https://jewokiwisaze.files.wordpress.com/2020/07/50256889802.pdf
    • https://wopapifura.files.wordpress.com/2020/07/94384392675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/temufaxilagig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.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_off00007c6c.bin
eb451c85878d10f26a80f286c7774146e94f67383da00359c59652474d7783eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6C 4624 bytes
font_01_sfnt_off00008c31.bin
2fa613ed5d2a0950fc7c4d446d2e2288775922af428efe6a4f286a6c6567bb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C31 10968 bytes

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