Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b83fbc5263db1c…

MALICIOUS

PDF

45.3 KB Created: 2020-10-07 11:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 5e8c94cc3dcaf7fca5888de8306fb303 SHA-1: d0d2d5522fc79ae036d6e1d0c10f0309ebd78d9b SHA-256: a8b83fbc5263db1c90fdd3d330ab1e01661c742a2552cef28b423c920abe623b
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://gettraff.ru/strik?keyword=sebastian+leger+perplexity+personality+mp3+download In PDF document text
    • https://site-1042869.mozfiles.com/files/1042869/mozavomegekeninomozar.pdfIn PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/daloba.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/jibufakufelatok.pdfIn PDF document text
    • https://site-1043249.mozfiles.com/files/1043249/81900555112.pdfIn PDF document text
    • https://site-1038975.mozfiles.com/files/1038975/nibademo.pdfIn PDF document text
    • https://site-1039173.mozfiles.com/files/1039173/19956275882.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/zodusujuxukizex.pdfIn PDF document text
    • https://site-1039612.mozfiles.com/files/1039612/badebipakekapibefejijiz.pdfIn PDF document text
    • https://site-1040221.mozfiles.com/files/1040221/lopogokepakepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006618.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006618.bin)
    • https://cdn.shopify.com/s/files/1/0496/6871/8756/files/little_mermaid_cake_pops_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9091/2442/files/783_area_code_cell_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9772/2531/files/jesegeburulono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0533/1616/files/chapter_1_the_human_body_an_orientation_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/21_day_flat_belly_fix_tea_recipe_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1561/7691/files/2007_toyota_rav4_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9375/7603/files/nba_2k20_update_stuck_at_0_ps4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/3132987629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2437/8787/files/glen_meadows_park_association.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9586/0399/files/57536034995.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 extracted file (font_00_sfnt_off00006618.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6618 5948 bytes
SHA-256: 1d96f7e112dfab7999cc671408d41beb6f33903b314110680bdeddeacf220e08
font_01_sfnt_off00007a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 14484 bytes
SHA-256: cb6ce519751e8524b7859e604481c71310135686f63127f481064b743179cece