Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a978b703dfe4e3…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 18:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3852dbe4fb94e18b6957ef654324219 SHA-1: edef52869040fd110343e4d0dae4826d855025cf SHA-256: 17a978b703dfe4e33b51b784181b7d5fa5ffb51ac708b7dbbe82c56ac870c71d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malware or phishing content. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/pify?keyword=manual+de+arduino+nano+pdf", suggesting a lure to download a manual. The presence of numerous other PDF links further indicates a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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.com/pify?keyword=manual+de+arduino+nano+pdf
    • http://files.haciendalacapullana.com/uploads/1/3/0/7/130776594/93f08bd7b3645.pdf
    • http://files.natureismagic.com/uploads/1/3/2/7/132712323/6255996.pdf
    • http://renada.well-estar.com/uploads/1/3/0/8/130874284/posuwejitipo_kojapekipex_sujuk.pdf
    • http://files.oceanworksgroup.com/uploads/1/3/2/7/132712063/jesonozu_rizotemotux_wefafikenabu.pdf
    • http://files.yestocake.com/uploads/1/3/0/8/130814052/10e86bba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/75883225807.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/57822063770.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/blank_resume_format_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/jaguar_xk8_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3057/files/buwosovanomodujesojubi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/sozavevuliz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4947/files/ansi_c_balaguruswamy.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/49644806088.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/lonukixonakisugatiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/pugurepolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8620/files/vapatizob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/pipex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1c.bin
01907948eb0cf59a87d4879f4838f55e04c4a375146b1af76c44a2761a09b1de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 3028 bytes
font_01_sfnt_off000076e9.bin
0ebcf19dc01f05e11ed83df8fcfa1aff562991a892c7038244fca6906ec0faa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 4864 bytes
font_02_sfnt_off0000878f.bin
3954bdeabc259b76e4cd4126f49df6c0ebda89203e1fe81c16c9d7f48cace7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878F 15392 bytes

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