Malicious PDF — malware analysis report

Static analysis result for SHA-256 619f129ce9e3a13f…

MALICIOUS

PDF

48.0 KB Created: 2020-08-23 00:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7657fbeb7f77571241bc7b3dcba9004c SHA-1: 3978994b93dde1ea2d42aefcb8364f0e6beabb01 SHA-256: 619f129ce9e3a13ff07f7ddd008287c8d1eb347711dcda6d1612f522c9d200b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious link identified is 'https://ttraff.com/pify?keyword=acis+and+galatea+handel+pdf', which is flagged as malicious. The presence of a link farm suggests an attempt to obscure the final destination or to distribute malicious content through a large number of seemingly benign links.

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=acis+and+galatea+handel+pdf
    • http://files.theblondewhobakes.com/uploads/1/3/1/1/131164351/2f657507.pdf
    • http://files.bollingercountyhealth.org/uploads/1/3/0/8/130874431/bujoxupug.pdf
    • http://zuxumomup.diplomainprofessionalstudies.com/uploads/1/3/2/6/132680981/zoleve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/logic_young_sinatra_welcome_to_forever_songs.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/92385969891.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/59430829241.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/dofesipiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/zotilega.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/carteira_de_vacinao_animal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/71358776358.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/abdul_hameed_adam_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/36950121516.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/gepum.pdf
    • https://cdn.shopify.com/s/files/1/0452/7154/8066/files/biodata_format_for_job_fresher.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/gojorevexuxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/media_query_for_all_devices.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/39209075021.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/aptitude_test_for_job_applicants.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_off00007a13.bin
a1b5a2def611a34ff010ab696f65f5999bbe2998403f6fc9fffa21f902fcd5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 5308 bytes
font_01_sfnt_off00008c22.bin
4332168dff9d54fea5c8d0dd7122d55081274b966fc0e3dd50bdbee9377f0c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C22 11724 bytes

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