Malicious PDF — malware analysis report

Static analysis result for SHA-256 086467d99f1644ef…

MALICIOUS

PDF

53.1 KB Created: 2020-07-31 18:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1112dd4b2e1616a66c6ab01caeff2d4 SHA-1: e1afbacb9f68e2ce483420b72edda25357a1eb94 SHA-256: 086467d99f1644efd08630d378300d668390907005a8189224ca6f3f183e5216
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to redirector infrastructure. The document body contains a URL that appears to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly indicate a malicious intent, likely related to phishing or malware delivery.

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=rrb-+1099-+r
    • http://files.milsurpselect.com/uploads/1/3/2/6/132681296/wofutelusinuga-memubigofelufi-bizuzulibevov.pdf
    • http://files.detailsandhighlights.com/uploads/1/3/1/6/131607712/moboxofupi.pdf
    • http://files.hfttreefarm.com/uploads/1/3/1/4/131452997/luwuzaxasasetobup.pdf
    • http://files.infinite-life.com/uploads/1/3/0/7/130738765/7deff942d9a0f2e.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/29128415543.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/11111435591.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/falukib.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/jepuraxefeni.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/lokaraxaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/20942031064.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/pipesifixunibujesedubaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/dugovufuxitufutetoxafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/lorimelimuzupunitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/gadanavipipekakovobof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/pabaposopogofofunasomarop.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_off0000858a.bin
6bf200a998a5472cafae9aab42201b7970dcb151af730d6d0f7b888db3c8b665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858A 4788 bytes
font_01_sfnt_off000095f2.bin
2e584e793d0d78f64248917f19ab44473cba7fd37ea7401dae1beaebab084d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F2 15392 bytes

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