Malicious PDF — malware analysis report

Static analysis result for SHA-256 25edec9200b5639a…

MALICIOUS

PDF

49.5 KB Created: 2020-09-11 03:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01420403b2f0df8e4e3a962159983195 SHA-1: ae0987a0cf4e1778c189c18cbf915273850da966 SHA-256: 25edec9200b5639a6015bbf20f4c3d1e492901603736a116f3540a6222a5f394
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent link, disguised as interview advice, redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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://ttraff.link/wix?keyword=behavioral+interview+questions+and+answers In PDF document text
    • http://files.tsgsalesspot.com/uploads/1/3/0/7/130739175/suwejeluwe_gokejepomowiti.pdfIn PDF document text
    • http://files.stjohnspreschoolseaford.com/uploads/1/3/1/4/131483305/448576.pdfIn PDF document text
    • http://xidik.wheatgrasspublishing.com/uploads/1/3/2/6/132680981/e547940.pdfIn PDF document text
    • http://files.heavygrail.net/uploads/1/3/1/3/131380733/bitat.pdfIn PDF document text
    • http://files.vanessaker.com/uploads/1/3/0/9/130969476/a1d7e0095a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8365/9419/files/puwekazavofufawupawobogud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/67426643065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/76067395597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/delay_analysis_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1503/7082/files/chaffoteaux_pigma_advance_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/age_of_empires_castle_siege_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/xokunosonorazular.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc14e4_4bc289f6534642c68af85458d0bac9cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cd2f6ee4e29a45189d21658e1e5c2d3b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e00bd3_8dca5e1a2afa4e2caa3b082a9423fc56.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B4 5124 bytes
SHA-256: 48deb5184bb0c47697d52fd1bc87e694a5a6beb7e5aa2e102fc037af1c50209c
font_01_sfnt_off00008824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8824 10120 bytes
SHA-256: cc2100f140e3506a6a2b73941bd32f19f98f0487492f0fd67138819543c536dd
font_02_sfnt_off0000aabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAABD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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