Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca361f079044ee8c…

MALICIOUS

PDF

63.9 KB Created: 2020-08-08 07:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e541f3a53ddb2f857761e04da14ef4ab SHA-1: 8ae709f548718d30e727d457cda7217ae89420f0 SHA-256: ca361f079044ee8cab9d5f6e7344fcff24a9e53d2a15c0940d9933f14f4d4327
154 Risk Score

Malware Insights

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

The PDF contains a high density of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the string 'CCNA dumps PDF 2020' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful 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=ccna+dumps+pdf+2020
    • http://jotugim.paula-rose.co.uk/uploads/1/3/1/3/131398455/32358ad71c9f1.pdf
    • http://files.onesource-ph.com/uploads/1/3/1/8/131857315/5f35e.pdf
    • http://files.mrobinsonartworks.com/uploads/1/3/1/4/131454523/dowasow_pugewudovirame_rufurosol_wiwavife.pdf
    • http://files.birthblissdoulacourses.co.uk/uploads/1/3/0/9/130969801/dojikoboguv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/mocha_testing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/jenuxemivimopisoma.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/absorcion_de_nutrientes_en_el_aparato_digestivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/kogum.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/pafare.pdf
    • https://cdn.shopify.com/s/files/1/0433/5062/2358/files/best_books_to_read_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/87666705820.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/mpi_matrix_multiplication.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/74831519869.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6175/files/dawn_of_the_jedi_into_the_void.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/xobaruposamikezekedijami.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a87.bin
52e58acb179bb93ad4ef24c222ddddda635b3eace03bd24ef725f7993616b2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 5352 bytes
font_01_sfnt_off00007cab.bin
edc0f2d664f718ac1e825a267259119d0fccad57152fe8fb4fbf02fb6cb32cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 36148 bytes
font_02_sfnt_off0000c60c.bin
e29e4b6f596c8d3df3663be6f9bda02849f2875ddde55899dc4a2f5531f58da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC60C 13712 bytes

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