Malicious PDF — malware analysis report

Static analysis result for SHA-256 c205e86691bdf86f…

MALICIOUS

PDF

44.2 KB Created: 2020-11-01 00:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0c68051c40f180926e6d2800119e649 SHA-1: 236ee8e2cbb23652924fd15e8d58c788db0114ed SHA-256: c205e86691bdf86f6d9fa88b5c91016c6907aa5bc4054b8f3982830a4ef4112d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs, such as https://ttraff.cc/123?keyword=proform+725+treadmill+price, are likely used to direct users to malicious content or further phishing pages.

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.cc/123?keyword=proform+725+treadmill+price In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f9ca6c776b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f8b68eea5719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5f9de493df080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5f9d25ed6cb4b.pdfIn PDF document text
    • https://kizilezena.weebly.com/uploads/1/3/4/3/134354573/wagomumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f8d38f6571be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f8c565d0dd2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5f962d0a797db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/foneniz/26199509875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/dna_and_rna_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/romanesque_architecture_in_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/advantages_and_disadvantages_of_living_in_the_city.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3045/8780/files/81440672701.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/thinking_with_type_second_edition.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_off00006c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5460 bytes
SHA-256: ac318b99faf65ca266b68488dd5a81801beb6edd23a4b1721d55faf409827051
font_01_sfnt_off00007ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA1 11060 bytes
SHA-256: 4c6369222dda2e59d329b9edd34c5d0557b148780f75bce43bad7a2bc9c8a106

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