Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b057e5495bd5170…

MALICIOUS

PDF

35.2 KB Created: 2020-08-11 16:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feaacc59e3f3712d6ff5ef676e5f544b SHA-1: 2c0e79771ebe43f1923973e0d2c3ce8db62c6b87 SHA-256: 5b057e5495bd5170c9664dc1eea4468edfd84828d4d9d2b89695d029f635bb74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=icao+annex+14+arabic+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=icao+annex+14+arabic+pdf
    • http://files.cheltenhamconnect.co.uk/uploads/1/3/1/4/131409463/c3cd68d3751.pdf
    • http://files.dancewithmestudios.com/uploads/1/3/1/3/131383377/towotiponuzeked.pdf
    • http://files.nextcow.com/uploads/1/3/0/8/130873944/mebufekewo.pdf
    • http://files.jasonfranklin55.com/uploads/1/3/1/4/131437633/jodenimedulo-lorerosagumi.pdf
    • http://petiboj.drchrisphillips.com/uploads/1/3/0/8/130874038/28dfcf27bc07a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/21694123294.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/nosenatoxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/peer_authentication_failed_for_user_postgres.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/two_way_solid_slab_design_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/jusofukedulalumewitutiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8646/3647/files/catequesis_para_nios_temas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/25485261913.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/74194058406.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/gakefakegexelunar.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/bogusalirapefewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/way_of_the_cobalt_soul.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/machine_learning_algorithms_stanford.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_off00004e58.bin
e3929903c1ee8b7c4b79f104225e0b28c88b0f9a1a1b5c4132f66338f770fcb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E58 5224 bytes
font_01_sfnt_off00006030.bin
8fef99b76982274a16d837ca63788404bed4d7a2d494511fa36ce49e4115c897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 9568 bytes

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