Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c925ed0fe954ee9…

MALICIOUS

PDF

65.9 KB Created: 2020-08-07 08:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e27eeb9c71aaaaa3f6d2f67359e73b33 SHA-1: e675b59d1d0e81bf290670284758d9ed0e71a870 SHA-256: 1c925ed0fe954ee9f44e3279dad81c4f61590c7d041880cada53ae84e0fcd1ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.cc. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to generate traffic or distribute content via numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL, confirming its inclusion within the file 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.cc/pify?keyword=filo+basidiomycota+pdf
    • http://files.aliveandwellband.com/uploads/1/3/1/4/131452735/a9a18990efb62d.pdf
    • http://files.canadaimmigration-lawyer.com/uploads/1/3/1/6/131636697/sevujafajupaveteduxi.pdf
    • http://files.meglelvis.com/uploads/1/3/2/6/132695325/xotumapapo.pdf
    • http://files.muppetschildrenscentres.com/uploads/1/3/0/9/130969026/bimukotawonopaxumavu.pdf
    • http://mujetot.hpackids.org/uploads/1/3/0/9/130969426/188f0.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/6820471032.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/legend_of_zelda_minish_cap_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/20246597262.pdf
    • https://cdn.shopify.com/s/files/1/0437/8643/6759/files/93414086073.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/facts_about_animals.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/passive_form_exercises_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/gemeliworawelizub.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/mesale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/44617907816.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/18668840452.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/sas_70_reports.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/piraxuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/pufigototemanufuxopumiban.pdf
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/bloodlines_2_richelle_mead.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_off0000c316.bin
18788e84870492daf04a1ba2d2da08bd2539815399d22588d75ca74fdad75dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC316 5404 bytes
font_01_sfnt_off0000d56e.bin
7090a904d87021ac417bf2826da796a732dc9624078c1313ace3a9d424652789		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 11080 bytes

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