Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72320fa18a050fc…

MALICIOUS

PDF

53.0 KB Created: 2020-11-03 03:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26e43b3ccc05c3d16a735e3294fe9078 SHA-1: bfe5468c4d0849bb357a24234e38541d7dfe7a79 SHA-256: d72320fa18a050fc19647016ae621f38078842eae27ecb41e5d43b0fbe1660d1
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/pify?keyword=reviews+on+samsung+ht-j5500w+sound+system'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/pify?keyword=reviews+on+samsung+ht-j5500w+sound+system In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5f99054a8d410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f90989967541.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/boligosisaxatov.pdfIn PDF document text
    • https://xuxuroxipekawip.weebly.com/uploads/1/3/4/2/134265976/texitifebuwim-bupepupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4784/4502/files/defukanafikaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6079/5798/files/wekoz.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/proof_of_mean_and_variance_of_negative_binomial_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7153/6804/files/cycle_country_plow_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/63241639292.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/slipped_disc_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/grizzly_g7943_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2207/8875/files/35321678029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6523d1bd-7fbc-4c92-ad8d-526fe09b2e5c/jubasofivilixugefinow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0580/2158/files/murray_hill_middle_school_demographics.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/zixuvajoxuwovizudakon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D86 5744 bytes
SHA-256: b4ecf246cab8f8f4343f4e17fbf6a9aa26007288525ac2c9afe49351513dfd30
font_01_sfnt_off0000a11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA11A 11040 bytes
SHA-256: 37861804eebf9cb8fd4f514ddd0f562e865bc7b68db43c1888e22824e8057f94

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