Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18de2106caa771a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 20:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8af9615a6cf0b4816b923e98cbec7822 SHA-1: a2362ca393e71b645da0f463be9bcb567f77a17e SHA-256: e18de2106caa771ac087678d925cbd6ecfbf8894f07fc654d8a3d73980047f46
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=movimiento+circular+uniformemente+acelerado+ejercicios+resueltos+pdf+1+bachillerato', is a redirector. The document body contains a mix of seemingly legitimate text and embedded URLs, suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links points towards SEO manipulation for traffic diversion.

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=movimiento+circular+uniformemente+acelerado+ejercicios+resueltos+pdf+1+bachillerato In PDF document text
    • http://files.embracingspirit.net/uploads/1/3/0/7/130740221/mirinuv_kagawulif.pdfIn PDF document text
    • http://files.signalmountaintravel.com/uploads/1/3/1/3/131382032/vonerijawi_mefaf.pdfIn PDF document text
    • http://files.tranquilitymassagetherapy.co/uploads/1/3/2/6/132682039/wazewo-wugoremegaxidu.pdfIn PDF document text
    • http://files.fredmealiaphotography.com/uploads/1/3/0/8/130813630/bavape.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/1/0432/2515/3698/files/benefit_verification_letter_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/niwulirubezoxixafubixuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/22769244700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7237/1350/files/xasaduziwipusado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16494210232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/98431196041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5689/3847/files/auditoria_administrativa_ejemplo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/85721908715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/40486153902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/dopivazilomebazobewim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/3723540782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/gijuxejinobaduruneb.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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 5728 bytes
SHA-256: 4804f959f4e965ea205f9cf8cade1acb3c0b22a5e03f36bdd08dc486a950549a
font_01_sfnt_off00007a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 10304 bytes
SHA-256: cfe85d3f67cb5c5c7fb88f16dc1be3fbbfd63165791120c5d143cb15baf807b0

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