Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1efe08839110ae2…

MALICIOUS

PDF

38.7 KB Created: 2020-09-21 02:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 014370388216c701bbd1b7e85483942a SHA-1: 6b16d0e771e394be6e74e8a5c6f3b478d5064468 SHA-256: f1efe08839110ae21a3b30897b30e987fe41699715743fea305fddbf5742b172
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to ttraff.com, which is known for malicious activity. Additionally, it features a large link farm with 24 external PDF links, many of which are hosted on filesusr.com. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=the+science+of+self+supreme+understanding+pdf
    • https://8753e08b-6f5b-4f8d-8922-f2d4ca646b21.filesusr.com/ugd/cac9e4_8d8bc113bccd41c9b949da0253848081.pdf?index=true
    • https://fc3bdc4b-c5ec-4030-9f9d-aae31dacc814.filesusr.com/ugd/03ae60_c2f51f3acb52407d9c43b50f3829c263.pdf?index=true
    • https://a932ed61-e65e-4603-a9a3-cb37ef788c1a.filesusr.com/ugd/c4ccc4_b5cff8b83bc64fd7b6118e2d6b979c11.pdf?index=true
    • https://230bfe57-637b-4d40-b7bf-ad884d0e63c4.filesusr.com/ugd/38062a_ddb513369ec748e9aa1390e4555206dd.pdf?index=true
    • https://8465f668-2ca6-4bce-93c9-59b835231be3.filesusr.com/ugd/eaf48f_8f68156a7d0a4cb1bb16607561bcb739.pdf?index=true
    • https://7c172e29-1515-4f98-bd89-95bb4d9f8f15.filesusr.com/ugd/90d19e_b8e7a15187524de6911ea0deac59a611.pdf?index=true
    • https://bb7079e2-f621-49e0-9ab5-83732d06b923.filesusr.com/ugd/c1c462_51713ac6831c4aa991a9a04345c19e72.pdf?index=true
    • https://133b5eca-4f63-48f9-bc15-05fd05fc70a2.filesusr.com/ugd/5262df_91b73aa98d8543479e57a8564228e314.pdf?index=true
    • https://73390c5c-25d4-4ea8-a17f-9bd7dffe765a.filesusr.com/ugd/10cedf_f7feb7dac60f452e87ba7c60fb14567e.pdf?index=true
    • https://686a5b63-c2c8-44d0-bf42-da769c693683.filesusr.com/ugd/b85eb0_76b7ca36982144899d490bdb888e026e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/91906065544.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/catcher_in_the_rye_study_guide_questions.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054e5.bin
62302448082e09397ba2fac870d840b4739f0198c68d61734575eb336c343ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E5 5516 bytes
font_01_sfnt_off0000677e.bin
5e46a71c444b341c8e4c7e7943cfac7103a6825ba3a728835eb7d9193c440dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 10812 bytes

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