Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d2186bbd33b49c…

MALICIOUS

PDF

42.5 KB Created: 2020-07-09 21:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 277fe11c8a5077ba7b6b7029bfb25327 SHA-1: cd007477e550473cff076686dca4ad747c762245 SHA-256: 67d2186bbd33b49c574025cabd7059949a7ef416f0a3b9a2ea3bcf1056877a9d
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and numerous embedded URLs suggest a link farm or redirection scheme, likely intended to lead users to malicious content or phishing pages. No scripts were extracted, but the overall structure points to a malicious document designed for user redirection.

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=the%20miracle%20worker%20play%20script%20pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • http://files.hpcctimex.com/uploads/1/3/0/8/130873830/78174747e.pdf
    • http://files.zeroinfections.org/uploads/1/3/0/7/130739120/zoxuxokek-naxazuxazo-rukemisi.pdf
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdf
    • http://files.blmslibrary.org/uploads/1/3/1/6/131606644/ebdfe5.pdf
    • http://files.hoolahoopgreetings.com/uploads/1/3/0/7/130775633/a8c5b0689d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://filozurebi.files.wordpress.com/2020/07/fijepakukuvo.pdf
    • https://verokizafiwi209368049.files.wordpress.com/2020/06/nujabiziwusedupatediseja.pdf
    • https://nafokajit.files.wordpress.com/2020/07/2084245358.pdf
    • https://dufamisiril.files.wordpress.com/2020/07/kenegowiwopupisexokirob.pdf
    • https://ratekoxon.files.wordpress.com/2020/07/supalodowososaxiz.pdf
    • https://pitimonuzoxa.files.wordpress.com/2020/06/musaxibatedusitejovota.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.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_off00006774.bin
43a772c3232675951984232cfc9545cab2511edf649d2e09a5e35f12c48216e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 5284 bytes
font_01_sfnt_off0000797b.bin
2c4b51bd6cf7c1167735d69b14d85b974b2c338f5cab76e4b8fd80bb17de37dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 10360 bytes

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