Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb3f7db36bd4a65…

MALICIOUS

PDF

37.8 KB Created: 2020-08-07 16:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2740dd2000a64f47ac51028a8e008d10 SHA-1: a03ec13bef81e56beaa6d8951909615b3bcb3731 SHA-256: dbb3f7db36bd4a65d6a1f1f15a9bb200fff157a08ae6435994bebfb667a27948
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=tesis+sobre+aprendizaje+significativo+pdf', which is likely used to direct users to a malicious site. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting a lure to download a malicious PDF.

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.cc/pify?keyword=tesis+sobre+aprendizaje+significativo+pdf In PDF document text
    • http://files.mokanjaxwax.com/uploads/1/3/0/7/130776263/5731854.pdfIn PDF document text
    • http://files.allysanimalproject.org/uploads/1/3/0/9/130969551/wixiba-vugepilisug.pdfIn PDF document text
    • http://files.astrojournals.com/uploads/1/3/1/3/131383764/dowigulezupupatuxexo.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/1/0433/2693/1099/files/emt_pipe_panasonic_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/kewizaxeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/3252974554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/virulelukewisefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/satufokamonig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/34204147946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/essential_english_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/6145054428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/kubanope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/rapejapul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/ropevepisovaguxadafosefu.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://hdl.handle.net/10644/3786In 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 3

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_off00005281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5281 5568 bytes
SHA-256: e6ed0a908427bbc53e340dcecf7fdec748d660248959d230c10ec8bb8ccc8d1e
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 10644 bytes
SHA-256: 9d6b830352eeeb1685f57a4dd711941885a7b663b41abc3a35f62993cb9b3d69

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