Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cd8353ae00e32c…

MALICIOUS

PDF

41.3 KB Created: 2020-09-19 06:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149ab0834fe7df457afabef7de1f07c1 SHA-1: ad6ea44127e8bbc8ed741c05693fb3733f8b3241 SHA-256: 44cd8353ae00e32c25adb9b59627c3510149d7e388532fde4745de04b76b3eb6
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.link/wix?keyword=india+house+houston+cricket, which is likely the primary malicious entry point. The presence of numerous other PDF links suggests a link farm strategy to obscure the ultimate destination.

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.link/wix?keyword=india+house+houston+cricket
    • http://bafenav.htciaconference.org/uploads/1/3/1/6/131606490/8144996.pdf
    • http://files.phillipsmathandphysics.com/uploads/1/3/0/7/130740249/2271e.pdf
    • http://files.arc-sf.com/uploads/1/3/1/1/131164112/zidusudigafexu_rexunobivavejo.pdf
    • https://98bf3ea1-166a-455d-9e15-2917413fe1c7.filesusr.com/ugd/b58d21_df2dc77befc740c9bb7afb221c2c1980.pdf?index=true
    • https://f5bbabdb-4eed-47c3-87ee-c3c6130e7439.filesusr.com/ugd/f09a9d_6b611f0487354dd3b8e5a4054a395913.pdf?index=true
    • https://c5820045-c0d6-430a-b988-224c4fc7ba48.filesusr.com/ugd/384ea4_4af3af3088924c53b1d8be1995a6bd31.pdf?index=true
    • https://9eb564bb-2189-4e6f-a4d7-b237db122fe5.filesusr.com/ugd/12f4eb_7cfb164bde7a4fedb6a29c8108b7a4cc.pdf?index=true
    • https://373ec85a-6a80-4009-b0b4-57f657bc18ad.filesusr.com/ugd/ab059d_a49d3997f6984542adba09c987148d8c.pdf?index=true
    • https://311eef71-fbce-4049-81df-e597724f8504.filesusr.com/ugd/1b8612_1e0f0cd53b394ff9b8f3bf2ce8cd5ca9.pdf?index=true
    • https://92f39e2e-ad87-4ab2-a333-d387fcd41310.filesusr.com/ugd/bdc04d_0bc45c98995e423fbb2f559a45701fe5.pdf?index=true
    • https://ca189df9-d51c-4341-8ac7-90b3ca896912.filesusr.com/ugd/cc03df_14a34a16ca9f4e088078248b60b7d8f4.pdf?index=true
    • https://a7626784-fe8f-489e-9f47-fa0c81dc9b93.filesusr.com/ugd/97368a_c44c5d77895e4f6d9e5aa716d3115f09.pdf?index=true
    • https://03923a76-6666-4471-978f-61332688380e.filesusr.com/ugd/edb4a7_12f057b95edc454aad40ffbb2eadebb0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/86020749265.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/31052024231.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/75243003196.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_off000063d6.bin
2193ba056d9eb15e96d1fd6058c635ac1475a77449de90482e0c5011558e7d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D6 4996 bytes
font_01_sfnt_off000074c9.bin
64cc45c357f631b6f6196673d7b91a287661d72b22e6695c563602287caaf335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C9 10432 bytes

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