Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe9c728f66d6a54…

MALICIOUS

PDF

43.4 KB Created: 2020-09-16 21:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3173265eaaeb003edba82337bdf6ac6 SHA-1: 7e9f2c0cafaf16717135cc2078d1bb281ca86564 SHA-256: 6fe9c728f66d6a545106cc30ea3f1ec07066c11ce37fd6c01ecb0fa18f270f33
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/wix?keyword=combat+strike+2+hacked. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to other PDF documents. The ML classifier strongly indicated maliciousness, suggesting the document's primary purpose is to redirect users to harmful content.

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.me/wix?keyword=combat+strike+2+hacked
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e9d004e-55df-445b-af38-5c47361f8be2.filesusr.com/ugd/405339_8fef814695294250b054b0db4a939fff.pdf?index=true
    • https://71689324-3992-44d7-b8d2-939ee3e92b08.filesusr.com/ugd/595093_46b316bb289d417b9dbd66682952cc29.pdf?index=true
    • https://47d15e5a-115a-4bf0-a092-46c32623ff0c.filesusr.com/ugd/c722c2_5549dfaf59144529b6cfce952dd47844.pdf?index=true
    • https://116e1baf-0406-44f6-898d-e677c546913b.filesusr.com/ugd/98e2de_81e1412f301d42fcaff89feba1ae1233.pdf?index=true
    • https://32df0714-3b79-4e1c-8f6c-3c32ca99b753.filesusr.com/ugd/136d3d_b3c04815c0214251badc00c485f82503.pdf?index=true
    • https://fc3062ff-fe48-4bd3-bbe2-6a1a2307ad7e.filesusr.com/ugd/3c8574_8462c6359ba8417b906fcb91e8830e5f.pdf?index=true
    • https://d1ca4fce-3646-4656-8cb6-447002612d24.filesusr.com/ugd/a32c20_de2c2c4ea6034a128e9af0a3799ef765.pdf?index=true
    • https://6f775e63-0572-4a21-9a42-1013e3d440fc.filesusr.com/ugd/3835dd_5689e07dca3347d1b179bca56342b994.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/89947559783.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/67394946856.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/25197334601.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/gepizoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/netis_wf2780_manual.pdf
    • https://ba1a528b-f46f-4c03-96c4-fe5e9e04e695.filesusr.com/ugd/735189_95058f91c8eb48deb234ecc1ff46e518.pdf?index=true
    • https://3f8fddcf-46ea-4724-9160-c1b84ecf6658.filesusr.com/ugd/003b86_95ea7595ea3a478ea4798bcfe53eee29.pdf?index=true
    • https://b00faec9-4ce8-43b2-9333-96c3aafec977.filesusr.com/ugd/65b209_edba3cfb5a5b4dcbb142f47fd48dbc20.pdf?index=true
    • https://c4fd2dbc-d125-42af-9b94-ae9ba9365d8f.filesusr.com/ugd/c83fdb_702b0d098d174bdc92c0ce7a53811e5e.pdf?index=true
    • 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_off00006a87.bin
fe04fd9ff95522d6406a342bbf7e2889bf3be0aee1aad0b392bef7c27dbfad12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 5388 bytes
font_01_sfnt_off00007ca7.bin
9de3686aed7c156eb68a41aad296da034b919236c4db8e4b36994db482fa5028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA7 10856 bytes

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