Malicious PDF — malware analysis report

Static analysis result for SHA-256 2764d14e6ad4a7f5…

MALICIOUS

PDF

45.6 KB Created: 2020-10-29 11:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 62057971356c39fe95e70680e5d8766a SHA-1: 329e66a6fdeee6771dcfc083c9e8a302263d4827 SHA-256: 2764d14e6ad4a7f590c61384f03223419183c0e257f45f441b9792b6dab03024
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a redirector to 'ggtraff.ru'. This indicates an attempt to direct users to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to lead users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=bayfield+wi+weather+september In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8715be0142a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f889104c9032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f92113ebdf96.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/1726140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5f9a44ecae6d3.pdfIn PDF document text
    • https://wubabenababi.weebly.com/uploads/1/3/4/4/134432193/3328694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f8fdd27d2a76.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/1/0500/5760/9386/files/90434085453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4739/4719/files/tie_dye_shirt_instructions_after_dying.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7735/1606/files/xotixijokomuwoverok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/minecraft_plains_seed_1.16.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3886/8124/files/morufobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/self_guided_tours_vietnam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7290/6150/files/rugidixora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4493/5095/files/75809634412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/world_war_1_propaganda_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7919/7353/files/blank_alien_periodic_table_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2647/9769/files/hague_adoption_convention.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6827/6903/files/93011784997.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_off00007173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 5664 bytes
SHA-256: db7e4997db9e71aa35c13bd795be16fd993a01991d7e5f277aaba575ada3add1
font_01_sfnt_off000084a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A5 10644 bytes
SHA-256: de0e9ce8b75de857555dc16401646eddfdadb5797c48fddf4faf286e70338f19