Malicious PDF — malware analysis report

Static analysis result for SHA-256 017569625b153889…

MALICIOUS

PDF

40.8 KB Created: 2020-08-13 01:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc82b4bbad174f76ee537baf3785e5d SHA-1: 71553a7f1435ea160487ab2e651f2d186141b0e7 SHA-256: 017569625b1538897a1c7433bdb6b94ddc149f1f93701269e05dbc4602ec246b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a direct link to a redirector, indicating a phishing or scam attempt. The primary link, 'https://ttraff.cc/wb?keyword=convert%20google%20form%20to%20fillable%20pdf', is designed to lure users by promising a useful tool but leads to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=convert%20google%20form%20to%20fillable%20pdf
    • http://files.runnerschoicewaterloo.com/uploads/1/3/0/8/130874610/938c8d9da17fb.pdf
    • http://files.anglersforoffshorewind.org/uploads/1/3/0/8/130813301/fupoforavitej-julir.pdf
    • http://files.laneanimalhosp.com/uploads/1/3/0/7/130776022/mevifesemixuto_lufaw_kawolig_maxudimuve.pdf
    • http://files.wcfbfoundation.org/uploads/1/3/1/4/131437513/43596.pdf
    • http://files.myvioletsinbloom.com/uploads/1/3/1/0/131070452/4617112.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/pivukegogizaregiluguj.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/sevojetenara.pdf
    • https://cdn.shopify.com/s/files/1/0449/8276/3679/files/dungeons_and_dragons_5th_edition_character_sheet_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1292/1256/files/66298440644.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/apprendre_le_franais_pour_dbutant.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/bracing_cold_formed_steel_structures_a_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/56721874570.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/tratamento_angina_estavel.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/junapitodaropos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/nezaganevenu.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_off00005f59.bin
27207e1e139225f659304859230595787e1f4141d3eb6eb4ba920d605f6a2992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F59 5288 bytes
font_01_sfnt_off00007142.bin
c9215f7c73abe26b07d2d439a6416dbde5afbddd6b0e18cbc7f877b3d6bf9f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 11096 bytes

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