Malicious PDF — malware analysis report

Static analysis result for SHA-256 496eae416346b3dd…

MALICIOUS

PDF

46.6 KB Created: 2020-08-29 21:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39594dd527edf8990eb4db0331fa1da1 SHA-1: 4e36d223db55814a26bedbc8b1025f29100a880a SHA-256: 496eae416346b3dd8deef802a5f149ee19e11497b4a94bfe94fc203a4775a384
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector link to 'ttraff.ru'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to 'deck building guide clash royale' and the malicious URL, suggesting a lure or redirection mechanism.

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/wix?keyword=deck+building+guide+clash+royale
    • https://cdn.shopify.com/s/files/1/0462/5855/2981/files/bee3_label_printer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/sosekadekow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/manualidades_con_botellas_de_plastico_faciles.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/nejujezef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/mmt_grading_scale.pdf
    • https://cdn.shopify.com/s/files/1/0462/6415/6314/files/java_chat_application.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/bombsquad_mod_apk_unlimited_all.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/21002285089.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/97516354094.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/responsive_bootstrap_templates_free_for_asp._net.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/autoformation_windev_mobile_20.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/mozonavadurufiwawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/benajavosexiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/9534087952.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/badminton_footwork_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/cours_de_l_argumentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8063/files/agilent_hplc_columns.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/
    • https://cdn.shopify.com/s/files/1/0433/6690/8063/files/agilent_hpl

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007870.bin
f4be021cebd955bcb95732ee346875d31edb6727bab312a5cd2afb7fd3e02a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 5504 bytes
font_01_sfnt_off00008b1f.bin
9c9bed0baba73151689734df5100e7d4086a3f21b41d0b7e988bed6a623e757a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1F 9984 bytes

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