Malicious PDF — malware analysis report

Static analysis result for SHA-256 6169d6c4361848a8…

MALICIOUS

PDF

39.8 KB Created: 2020-08-07 00:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fac2c976ecd148e4850c0b0670423c4 SHA-1: 6f97682a0b321c5cf1e16bc930efdabd837a7b3f SHA-256: 6169d6c4361848a8999035f5aa038875258c82e2504b68fcb0190dc90bc32f79
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service designed to lead users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malware. The primary malicious URL identified is https://ttraff.com/pify?keyword=agata+bielik+robson+pdf, which is flagged as a known malicious redirector.

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=agata+bielik+robson+pdf
    • http://jeteg.starsmeritclasses.com/uploads/1/3/1/0/131071157/7602975.pdf
    • http://files.floralgreenspublishing.com/uploads/1/3/0/7/130739510/zegabikuwelowerev.pdf
    • http://files.hihco.org/uploads/1/3/0/7/130740496/9766448.pdf
    • http://sixip.ohsnapphotodesign.net/uploads/1/3/0/7/130738524/birosizined.pdf
    • http://pebelofiw.antalya-ulasim.com/uploads/1/3/0/8/130874631/nidarusog_numijeru_vilewizure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/xuzazanupuzeforiwogutobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/69420775413.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/9102273041.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/first_and_third_angle_orthographic_projection.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/81835702888.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0729/files/acca_f9_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/kotepeveduxox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/wazinowizavizavotin.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/52369701185.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/povigudatolut.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/21381931582.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/gosunibupan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/surgical_treatment_of_cataract.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/83424741739.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_off00005c7b.bin
2e57b6e6a14ba33ffaee7b3986f8afc41c24a203e1d029e145088fbcf7373994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7B 5404 bytes
font_01_sfnt_off00006ee9.bin
82bfe76b5ff6e3992436d13df34ad4818ca398996fec2dace16ab46afb0e14f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE9 10364 bytes

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