Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8faa3750b0d0e8c…

MALICIOUS

PDF

40.5 KB Created: 2020-11-03 06:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 5c3368e7ed81450e14cb2aa99ac8d003 SHA-1: 772cd65f77888740fdcd942bc11df3815fde1038 SHA-256: d8faa3750b0d0e8c5905e437f73bc47b50b0b3a087eb79ab137d2a29d695e6f6
194 Risk Score

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=movie+box+apk+download+for+ios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5f919864965e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5f8e9c80463ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fa09a31bfbfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8e63ee5bd8e.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/1/0494/0569/0023/files/scale_factor_printable_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690bcb1a-19e3-4ca1-a58b-8c12027d1af6/rurobinobuzokepipexeta.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/84975152440.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/39848650422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc4b19c-21f7-4024-bb6d-936be2d3dd6e/45665221931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/poxepixekuvejaxakuxaja.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/chess_2020_deluxe_version.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_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 5464 bytes
SHA-256: a3708e1ac501e32af5c8ce66572cc3e7cd62b5be7f6c894d034d4ae99e21706c
font_01_sfnt_off00007193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 10612 bytes
SHA-256: 9580863ce1c6be0b51d00d74833c1a2932f4379c998a209ed81af4772cebc3c6