Malicious PDF — malware analysis report

Static analysis result for SHA-256 7828ebff332e2eb9…

MALICIOUS

PDF

42.3 KB Created: 2020-10-07 00:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-16
MD5: fdb35260925691b5a6f0e6d2011adc65 SHA-1: b1f9c71f554023afe9c55af4fc19554912b2abeb SHA-256: 7828ebff332e2eb9a6f20740688bc7abac5ff25e8452e292ab1000e336188cdb
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/strik?keyword=fps+cao+vip+apk+download In PDF document text
    • https://site-1043580.mozfiles.com/files/1043580/visigitizijusatujowigoz.pdfIn PDF document text
    • https://site-1038728.mozfiles.com/files/1038728/sofapifugil.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/20862175127.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/86576468356.pdfIn PDF document text
    • https://site-1037883.mozfiles.com/files/1037883/11313793434.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/20072503555.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/8354120928.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/19671683399.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/81026907953.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/1/0496/0396/9173/files/go_math_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/fadasapinigitidiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/growing_growing_growing_investigation_5_ace_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0418/6783/files/sap_abap_smartforms_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3837/4050/files/33102471184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0534/7493/files/16801191005.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_off00005c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49 5140 bytes
SHA-256: 7e3e3174a90a39d7fbd226ebc725f6db39b9ed64609b4a7f07e19b9882daafc0
font_01_sfnt_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 15092 bytes
SHA-256: f68c5fb8b6cc2cc475948b32c5ef600f9af2d01ed80c355fccf249ef39eefcae

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