Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e6717b3ddd7617…

MALICIOUS

PDF

43.1 KB Created: 2020-08-13 00:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8c8d5989bd4b2342914d526b60ba110 SHA-1: ba8fe376f1bc4df591f32c5fc949fb635a784f3e SHA-256: 14e6717b3ddd7617fe07809b65132f207b9c7d4d81dfc244fa2839d38aa9f7eb
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or distributing malware. One of the primary links directs to a known malicious redirector infrastructure, suggesting an intent to lead the user to harmful content. The ML classifier also strongly indicated maliciousness.

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=d%25E1%25BB%258Bch+file+pdf+ti%25E1%25BA%25BFng+nh%25E1%25BA%25ADt+sang+ti%25E1%25BA%25BFng+vi%25E1%25BB%2587t
    • http://files.swimatseastar.com/uploads/1/3/2/6/132680796/c0d92a96c08733.pdf
    • http://files.columbiayouthsoccerclub.com/uploads/1/3/0/8/130874361/170ccd052ee314.pdf
    • http://peled.northshorebostonrealtor.com/uploads/1/3/1/4/131483144/7514191.pdf
    • http://files.deannaheathrealty.com/uploads/1/3/0/9/130969206/7314664.pdf
    • http://files.micasitarentals.com/uploads/1/3/1/4/131406744/tibitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/change_management_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/effective_biblical_counselling.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/7955059720.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/din_en_iso_4762.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/blogs_de_libros_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/4675971905.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5917/files/rijemiwude.pdf
    • https://cdn.shopify.com/s/files/1/0436/0041/2835/files/avishai_margalit_la_sociedad_decente.pdf
    • https://cdn.shopify.com/s/files/1/0437/9138/4736/files/jupanozalapiraketejojoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/dekexob.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/50722161181.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/an_introduction_to_core_topics_in_alternative_investments.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/rarinuzulegimexojafagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/xejogomudafegok.pdf
    • https://cdn.shopify.com/s/files/1/0444/3337/5399/files/list_of_all_collective_nouns_in_english.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_off000064d7.bin
be0b93d0b8a9ab8fbe3ded5621f16364d5a7dcfcd26e6645b57bc17d811dd5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 6040 bytes
font_01_sfnt_off0000781f.bin
69493de5d65ad27dd111c617eddb1a298e9bcb03839171440d4dd245d0b083bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 10896 bytes

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