Malicious PDF — malware analysis report

Static analysis result for SHA-256 12080fc2804bbbe6…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 23:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e94efe48e8a3141a3710d68fa20414 SHA-1: c2c1b5304899d415a284a6b08928bc6255d37ff3 SHA-256: 12080fc2804bbbe6f762eb834e0f831c9fe982391e50b4df17488ebf572d9dbc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO spam campaign, aiming to drive traffic to malicious sites.

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.ru/pify?keyword=altice+one+channel+guide
    • http://files.auroraonfrance.com/uploads/1/3/2/3/132302764/7873119.pdf
    • http://files.nicolemillersandiego.com/uploads/1/3/0/7/130775063/gesud_kukutusupapor.pdf
    • http://files.mttfit.com/uploads/1/3/1/1/131163851/5867976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/causes_of_the_bolshevik_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/koruluvila.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/biochemistry_stryer_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/zulivenimozujege.pdf
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/adenite_traitement.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/fevuletolebinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/parowikuvunaboge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/bacterial_conjugation_transformation_and_transduction.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/55937430617.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/418863468.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/j_s_truck_sales_knoxville_tennessee.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/fedex_airbill_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/gifot.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef6.bin
89e1432c2258e4e68bdcae30c4bb7441d55586fa692b2f267946b2835847b6b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF6 4916 bytes
font_01_sfnt_off00006fa2.bin
8788d8cb740620252ee05ad1ba7dc388b0ce2ea72455414bb82a4db50f0994a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA2 15884 bytes
font_02_sfnt_off0000a106.bin
281214d1119d96f3a8ebe36682ff3c94e77595198e0ed7d049f81fad77dcdf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA106 16240 bytes

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