Malicious PDF — malware analysis report

Static analysis result for SHA-256 11567dba8ce34190…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 07:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7619d777709aaa294ab36613f1be4599 SHA-1: a610e41996fe09c50c0436902d8e57bc9780e238 SHA-256: 11567dba8ce3419092e3a2183ca812efd84a4e4fa1df4173108df2f0c0aef099
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malicious content. The document body and embedded links suggest a lure related to medical imaging, likely to entice users to click the malicious link. The presence of numerous external PDF links further indicates a link farm, often used for SEO poisoning or to obscure malicious destinations.

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.cc/pify?keyword=artifacts+in+mri+pdf
    • http://gafig.taiwanbeaches.com/uploads/1/3/1/3/131383483/rolejesoxur.pdf
    • http://files.bergenphotography.net/uploads/1/3/2/6/132682204/1172733.pdf
    • http://lexosev.categeard.com/uploads/1/3/1/4/131438079/2544e2fab5d.pdf
    • http://bivuf.highwaysnhoofbeats.com/uploads/1/3/1/6/131606289/vuzuxe.pdf
    • http://gozokaza.thegreatlife.com.au/uploads/1/3/1/4/131437987/fesulojo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5222/files/58919796838.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/69594169545.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/les_amplificateurs_oprationnels_cours.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/90164120414.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/70748938467.pdf
    • https://cdn.shopify.com/s/files/1/0438/5583/9382/files/66205005978.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/12930437562.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/95828787902.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/gotapetamevosokewikagabid.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_off00006583.bin
734aa7b59de5a96c17965d8f0df28ffa422078460ec5338c263ee225a659ff46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6583 5260 bytes
font_01_sfnt_off0000774d.bin
a57e79a9d6d8f21a68f06735abbe335e5e6e09e1017246558c253f174b2e0fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774D 10640 bytes

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