Malicious PDF — malware analysis report

Static analysis result for SHA-256 66297d49f5746511…

MALICIOUS

PDF

51.4 KB Created: 2020-08-08 03:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a2161cc81790c09e794f4f9817fb70 SHA-1: c3f7b04ad7cc9fbc5f91b91d18c8580ab63acc8e SHA-256: 66297d49f5746511b640b81bbc66e6704451753fb9412bef2299fa580242c14d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. It also hosts a large number of links to other PDFs, likely for SEO manipulation to improve search engine ranking for the malicious content. The ML classifier strongly indicated maliciousness, and the document body contains obfuscated text and URLs that are part of the lure.

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=breathing+exercises+for+weight+loss+pdf
    • http://waraj.jessicamilne.com/uploads/1/3/0/7/130776257/2361235.pdf
    • http://files.aspiringvirtuouswomen.com/uploads/1/3/0/9/130969960/wegifupim.pdf
    • http://files.sorgsportandwellness.com/uploads/1/3/1/3/131383760/nijotilesa.pdf
    • http://bawofi.threeyogachicks.com/uploads/1/3/0/8/130874633/xolaxinidatimolino.pdf
    • http://files.greensoundhightech.co.uk/uploads/1/3/1/1/131163635/fejuva-nawuwizo-retexorinuja-jilatotemiwuvok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/monir_khan_all_mp3_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/essentials_of_economics_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0919/files/vetene.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/husqvarna_455_rancher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/bach_fugue_bwv_1000_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/junevonojeviz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0443/6580/7772/files/facebook_revenue_model.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6618/files/75680597749.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/devoreguzinikenukawerapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/que_es_una_cadena_alimentaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/german_to_english_translation_dictionary_free_download.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_off00007b7f.bin
709ed19c4db51e2f3ea94b9f114d7e4472671aca2a2ce14a3bf7ecc274f7bc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7F 5416 bytes
font_01_sfnt_off00008df3.bin
5b0a860f9eddcb300c9bc172b2155db79e7a47575d37a02e96d637d37b1ecbfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF3 10592 bytes
font_02_sfnt_off0000b223.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB223 4324 bytes

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