Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b9a697756a7bb3…

MALICIOUS

PDF

43.7 KB Created: 2020-09-04 18:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442639fea13f8592b19fa232203085cc SHA-1: e383a44397196346d6de03b21106437011fa1b15 SHA-256: 04b9a697756a7bb3d41651a20986706d1e1a6e55ddcdbfcbb8b579e6c79e0855
154 Risk Score

Malware Insights

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

The PDF contains a lure related to "Avengers Endgame" and embeds a link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute content through multiple links, with the primary malicious link pointing to a redirector that likely leads to further malicious content or malware.

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.club/wix?keyword=avengers+endgame+digital+copy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/16841185947.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/creative_writing_workshop_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/bizetada.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/numajuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/anatomy_of_human_body_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/adding_and_subtracting_decimals_with.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/ati_active_learning_template_medication.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/2014_cadillac_ats_2._5_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0466/5144/1317/files/best_dictionary_for_android_free.pdf
    • https://static.usrfiles.com/ugd/a474dd_e99cbcd62ac14826973ac094ec675c79.pdf
    • https://static.usrfiles.com/ugd/735189_9e42e593195f46c6906fd9b5beb25a09.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/game_god_of_war_3_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/mawosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/nazinurikajipuxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/pisifomixizeterak.pdf
    • https://cdn.shopify.com/s/files/1/0462/4171/0231/files/jojisuro.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_off00006b3f.bin
03c97ffb44523fc906f2e8f630f97078fe931f50db4327df915759be91df2a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3F 5544 bytes
font_01_sfnt_off00007e19.bin
f2ca0e30f870907113ef6c0a14f4ce712b5907922ea34bc4d61f79be84a35299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E19 10364 bytes

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