Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeae25018474759a…

MALICIOUS

PDF

41.9 KB Created: 2020-10-31 08:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9db91ed10318f73cd70f5ed9b65b672a SHA-1: 950bc3eaf2fd43083b1149fbb0e806d77dd3342a SHA-256: eeae25018474759a3c3628f58350f8bc58e238cad0d5e04fac572887256ce6ac
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a redirector at 'https://ggtraff.ru/aws?keyword=viva+voce+ib+example', indicating a likely attempt to lead users to malicious sites. The presence of a large number of PDF links suggests a link farm or SEO manipulation tactic to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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/aws?keyword=viva+voce+ib+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5f94ddf7cf466.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/1/0440/7581/0966/files/60302897598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1512/9248/files/vewaliweremidetomelon.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/john_deere_z445_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9748/3173/files/a_dozen_a_day_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4863/9897/files/preschool_worksheets_letter_z.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0020/7272/files/xuxabomineposafifozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/6788/8575/files/vawirur.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/logesoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/mary_joseph_and_baby_jesus_in_the_manger.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/guitarist_magazine_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/nepal_national_anthem_lyrics.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_off0000669f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5040 bytes
SHA-256: 31f221e79e50f1da8ca4cac3f9be604a8356ff7926d803dcd5c1089d474e2598
font_01_sfnt_off000077c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 10308 bytes
SHA-256: f0b507434d158cc4d806acecaa21e05cac49d6a19a955ae874118ab14607f0b2