Malicious PDF — malware analysis report

Static analysis result for SHA-256 97943609f60dbd16…

MALICIOUS

PDF

54.3 KB Created: 2020-10-31 21:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4f5dca79ed48a96691bde235cf841e SHA-1: 962755974d40eda7f7fab7ef3f6cb66146afe59a SHA-256: 97943609f60dbd1618293fdba592367746568788653809926adacaf5497ac588
154 Risk Score

Malware Insights

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

This PDF document exhibits malicious behavior by hosting a large number of external links, identified as a PDF link farm. One of the primary links, 'https://cctraff.ru/aws?keyword=badlands+flight+path+horde', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest an attempt to manipulate search engine results or redirect users to malicious content.

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://cctraff.ru/aws?keyword=badlands+flight+path+horde
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/1657773.pdf
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5f9648896f4ab.pdf
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/safuwuzelela.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/28ce9f9e-068c-459a-999d-cd6a167ace7e/6672767795.pdf
    • https://cdn.shopify.com/s/files/1/0497/3166/6074/files/mathematical_analysis_for_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0496/5272/7972/files/beholder_2_apk_award.pdf
    • https://uploads.strikinglycdn.com/files/e2a39823-347a-438e-9818-920d8e5f3e26/instafollow_premium_apk.pdf
    • https://uploads.strikinglycdn.com/files/131ea6f2-9d40-4c1a-b175-ddaa0d9013a3/zimoxetoduni.pdf
    • https://uploads.strikinglycdn.com/files/b68c0de9-aec3-40af-9b9b-d65bbb2ef422/24463715961.pdf
    • https://uploads.strikinglycdn.com/files/de534cb6-a704-486b-ad0f-988ae05bde23/electron_configuration_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/995256d8-766d-4b38-87d9-1e82434cc99f/tiwimagowigixebavise.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf0.bin
d66158ed1eccf6f1fc1d0df062bd4f9b44085ff77fb5e45c598272b664170007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 5352 bytes
font_01_sfnt_off00007f22.bin
1935a603cb9af1b0338829bdf5f1142fd16689f4d068e580326d5a50c868c67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 10736 bytes
font_02_sfnt_off0000a3de.bin
39bdec77e323ec71ceee8daaf370945c518fd92833d4df777adde47008a70b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DE 23588 bytes

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