Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5730d016b454982…

MALICIOUS

PDF

41.7 KB Created: 2020-11-05 01:33:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba67cad71c1d50d0887d76ab9337481 SHA-1: 187ddb443abb61d2a0d1e4feba68603bef489a40 SHA-256: a5730d016b454982c4885f9ac7eedd5f25fcaa6d3cfd660786ee7c05b1843fe7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised with a search query. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update to view content, a common social-engineering tactic. The presence of numerous external PDF links suggests a link farm or redirection infrastructure, further supporting a malicious intent to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/123?keyword=insignia+air+fryer+canada
    • https://cdn-cms.f-static.net/uploads/4427086/normal_5f99d2afe8abd.pdf
    • https://bosebozix.weebly.com/uploads/1/3/4/6/134601905/4493932.pdf
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5f9a91e9ad3fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a45d192-3c93-4678-91ac-a4967af6e0dc/92458332965.pdf
    • https://uploads.strikinglycdn.com/files/33b99a47-5e41-4e05-9d94-9574639f22d6/music_intervals_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/a5436221-c395-4932-a4f2-de1479a07ff9/bokovekijojavelamesafawa.pdf
    • https://uploads.strikinglycdn.com/files/84150965-d3ba-4200-9912-33ff639e34c2/natural_american_spirit_color_guide.pdf
    • https://uploads.strikinglycdn.com/files/5cf4d7c4-c1b9-488c-bcf9-5ad2d99691b4/2016_amc_8.pdf
    • https://s3.amazonaws.com/xapidajovaji/53678213970.pdf
    • https://uploads.strikinglycdn.com/files/c5ae6978-1f6a-48fd-823a-d27b6dc77f03/17328947872.pdf
    • https://uploads.strikinglycdn.com/files/e03f6290-e5b0-4017-bf38-7958c5bf05d0/liwabeg.pdf
    • https://uploads.strikinglycdn.com/files/91103924-f30e-47dd-80ad-f6971c501706/zodibed.pdf
    • https://uploads.strikinglycdn.com/files/aa7ff5d5-02d4-4e23-8a14-003000e1f700/nifasexodasekojixupab.pdf
    • https://s3.amazonaws.com/gifiz/michael_boyle_functional_training_for_sports.pdf
    • https://uploads.strikinglycdn.com/files/162484d8-06cd-4cca-ac3f-39da2d9437a3/act_3_scene_5_romeo_and_juliet.pdf
    • https://s3.amazonaws.com/zetare/parasitologia_humana_neves_13_edio_download_gratis.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_off000063ce.bin
6979af7a2ac6b7f62874b2d5182afec961e04f030fb8277d99632bdfe04ae09c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 5196 bytes
font_01_sfnt_off00007591.bin
49b966b92b3015c17cd23c03f1b9a8d75c553c54d3bf075f23720cd78bb04cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 11148 bytes

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