Malicious PDF — malware analysis report

Static analysis result for SHA-256 f299a252fa2ef18c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 19:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4995cdbeceb42c5b1f95e35c8dcc49e SHA-1: 3cde05395db4ed233b54c41a4e9fe65fd436e1c1 SHA-256: f299a252fa2ef18ccb171d0f2fc80a13a4ec9d974054ac19622881ff8365018b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Curso ingles pdf' and includes the malicious URL, suggesting a lure for users to download content or access a course. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the presence of malicious and numerous external links, respectively. No scripts were extracted from this sample.

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.ru/pify?keyword=curso+ingles+pdf In PDF document text
    • http://files.broadband4arizona.com/uploads/1/3/2/6/132695525/wivar-fozurivuzaj-sovizax-vovobabenavuz.pdfIn PDF document text
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdfIn PDF document text
    • http://files.amyhafemanndesign.com/uploads/1/3/1/4/131406432/bae17907c7.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/1/0433/5229/3541/files/xumenogarezajiveva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/bapezej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/zunezexavebokegiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/rigogufibegodexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/74257612106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/5016288421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/sozasav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/nosuvidizatadav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/91724316354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/pmd_to_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/wodalu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 4904 bytes
SHA-256: 9276a594a28bcbf5f590ed2a5079f71a4f60d2d1f01ebf0526a5a07d7b64911a
font_01_sfnt_off000070c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 11344 bytes
SHA-256: 6366fd5a05a718d24b510ea9a9cbd235d7ae827e1da2aa156082eb8fac185da8

Open this report in the interactive analyzer, or submit your own file for analysis.