Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8265368128de93…

MALICIOUS

PDF

34.1 KB Created: 2020-10-12 12:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 1b24873cd4cbfc30e8603fa9aca7e54e SHA-1: a972d84fd3d7d2390396faf63b55a711a70753e4 SHA-256: aa8265368128de93637ba985feb0812922779cdc05142a4db6e63b5c43b93d7f
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=mem%25C3%25B3rias+da+segunda+guerra+mundial+download+pdf In PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/77344282843.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/gawepo.pdfIn PDF document text
    • https://site-1038453.mozfiles.com/files/1038453/lovubegomeze.pdfIn PDF document text
    • https://site-1038592.mozfiles.com/files/1038592/jakanijefewizuga.pdfIn PDF document text
    • https://site-1037282.mozfiles.com/files/1037282/53794671558.pdfIn PDF document text
    • https://site-1041404.mozfiles.com/files/1041404/romulupimibijuxuravis.pdfIn PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/96842017061.pdfIn PDF document text
    • https://site-1042354.mozfiles.com/files/1042354/satozoguti.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/sizeni.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/1/0479/4440/1052/files/64gb_flash_drive_showing_32gb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/leadership_essay_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0443/1000/files/mega_man__bass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7839/5051/files/s9_pro_launcher_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3574/4663/files/xakadagopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/57087663014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/41776621626.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_off00004462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4462 5592 bytes
SHA-256: f5b18a7a5ea4584ae7bdafeae60f886cdebc25807d199174b64f636a21a8eb60
font_01_sfnt_off0000572c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x572C 10984 bytes
SHA-256: 42bbce25bae2ca1720177c7621f22381bb95a16b519bd443a1df52607ce99ff7

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