Malicious PDF — malware analysis report

Static analysis result for SHA-256 1244aa933e3c39bf…

MALICIOUS

PDF

46.9 KB Created: 2020-07-31 10:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b51825d876985bfeddd01abbfd0c5165 SHA-1: 21d77d112d5d545c2eb07c50daeea1491172a35f SHA-256: 1244aa933e3c39bfc6c55195b073eeeb864ac007438223ef9cb8b747b64359e1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector and part of a link farm, designed to phish users with a 'free download' lure. The primary URL, https://ttraff.cc/pify?keyword=importancia+de+la+tecnologia+educativa+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to the lure, reinforcing the phishing attempt.

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=importancia+de+la+tecnologia+educativa+pdf In PDF document text
    • http://files.rbdist.com/uploads/1/3/1/3/131398308/letafetasugako.pdfIn PDF document text
    • http://files.economicprojects.com/uploads/1/3/0/7/130740011/f0c454cee276.pdfIn PDF document text
    • http://files.onesacredmedicine.com/uploads/1/3/2/6/132681671/06dccf212533242.pdfIn PDF document text
    • http://files.sequoiabrigadecamp.org/uploads/1/3/2/6/132695432/2543933.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/1/0434/5203/9324/files/90257466544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/27796466563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/22574987531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5608/4630/files/47026123230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/76382153601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/82839764205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/56833845789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/nejowajobalerudiwive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/99326686353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/kepezigozifuvefasej.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 6

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_off000077db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 5176 bytes
SHA-256: da045a63b7c9bc2848fe6e4df5c77829f66ffc89c81fc7956147fc997ca8bb15
font_01_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10928 bytes
SHA-256: c6ef29932541e88fd579783129e9a1faab0109f2073fa361e2110c23fe971e13

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