Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ec5e4fdc8f8b3e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-10 16:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5c8161f3e3f00811f9ed2ec8c37840d SHA-1: ecd72b3a8c54fd90d7dacececd7ee7fa78405058 SHA-256: d2ec5e4fdc8f8b3e46d1c49336e5a842a204f69970ef2a3057247bcb98b8f7dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector (ttraff.com). The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several other URLs hosted on cdn.shopify.com, which are likely part of a link farm to boost SEO or distribute further payloads.

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=antidoto+barbituricos+pdf
    • http://files.foxtalesfiji.com/uploads/1/3/1/3/131383398/2162681.pdf
    • http://mibexi.slavicamericanfestival.com/uploads/1/3/1/6/131606490/jifaxawem-mevofivo-renimerakizowom.pdf
    • http://files.touchstonejewellery.co.uk/uploads/1/3/1/4/131406060/pifudes_lisej_jinepujoreniwew_bupipasexu.pdf
    • http://files.clarkfieldoutdoorsstore.com/uploads/1/3/0/9/130969548/5368163.pdf
    • http://files.gwarchitects-jm.com/uploads/1/3/0/7/130775198/5177086.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/nipesegelebedo.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/actualit_socio_conomique_en_afrique_francophone.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/35934516637.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/is_4894_for_centrifugal_fan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/american_cinematographer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0449/7352/3112/files/las_categorias_gramaticales.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2327/files/93670673981.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/pabegeranemajon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/formulas_and_functions_in_ms_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/tavazesopeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/88482397641.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/diseases_caused_by_gram_positive_bacteria.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007618.bin
77d6f85870c54ab389f381843c77e023fb3179b00be3e13b365e8c2ee335301a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 5248 bytes
font_01_sfnt_off000087f2.bin
fcb31bb360f2422b06261e6d4ea294765fa54ee4f299c88ef12feb6f60985910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F2 11356 bytes

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