Malicious PDF — malware analysis report

Static analysis result for SHA-256 0251feec6c6baf78…

MALICIOUS

PDF

47.5 KB Created: 2020-07-30 05:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e856e0f7cfefcc2641a675f1038ddaf SHA-1: 6ddc35aca63ab0c9fdca88b38f973da715ab2823 SHA-256: 0251feec6c6baf78df0772515acbf7b49e719439d5d1d7009bd01e39deb5a0d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'Spanish alphabet worksheets'. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly indicates a phishing or malware distribution attempt via a link farm.

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=spanish+alphabet+worksheets+pdf In PDF document text
    • http://files.viktoriasanto.com/uploads/1/3/1/1/131164129/5300626.pdfIn PDF document text
    • http://files.presscoffee2go.com/uploads/1/3/1/4/131408970/1917072.pdfIn PDF document text
    • http://files.joemckinneymurals.com/uploads/1/3/0/7/130775228/519b6729d48.pdfIn PDF document text
    • http://files.defineyourbliss.com/uploads/1/3/1/8/131871658/9fc93758eff.pdfIn PDF document text
    • http://files.jasonmokhtarian.com/uploads/1/3/0/7/130739269/f938b0d7c.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/1/0429/2309/8279/files/3042221613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/fowirokem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/zugijumobomejupunefuxit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/71884090375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/zadupodomof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/jinarib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/30375268875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/sinowupom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/99090945334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/15118418803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3143/files/95110271209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/zivexalexuwarujed.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_off00007b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 5316 bytes
SHA-256: b0ca76d258bba1bbb90be3ec6eb129b07e73ec53c3dc91d3e43a388232855f12
font_01_sfnt_off00008d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 10100 bytes
SHA-256: 525cd99878d4d137fe665e315a0487b9124165bc680668ca909b18695119e5e1

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