Malicious PDF — malware analysis report

Static analysis result for SHA-256 0744f22b32eb28c4…

MALICIOUS

PDF

35.0 KB Created: 2020-08-16 01:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13197e0266d456f7ff6e6e5aa3920948 SHA-1: dfeffc36712019cae04ad481fd4979121e46e809 SHA-256: 0744f22b32eb28c457fc18085616db4a608bd75d456bc78799c396d528b5e6a6
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a redirector service identified as malicious. The document body, though obfuscated, contains text suggesting it is a 'linking verbs worksheet 4th grade', which is likely a lure to encourage users to click the malicious links. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=linking%20verbs%20worksheet%204th%20grade In PDF document text
    • http://tuzut.knox-graceec.org/uploads/1/3/0/7/130738970/9f76b4.pdfIn PDF document text
    • http://files.englishvintagenotions.com/uploads/1/3/1/4/131454270/0696ba7d.pdfIn PDF document text
    • http://files.thinkhairsalonstudio.com/uploads/1/3/2/6/132682281/mogokudopejenojap.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/1/0431/6450/0122/files/jspdf_fromhtml_line_break.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/nomosadasijomizolizilux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1807/9655/files/34817927962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/74335923716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/sistema_de_irrigao_por_asperso_convencional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/africa_map_with_capitals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/bharathiyar_kavithaigal_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/catalogo_tecfil_em.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 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_off00004a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A40 5440 bytes
SHA-256: c2b363f8f06a388b4baca7792119483de91e06b8feb169ad22746a9010563eb5
font_01_sfnt_off00005cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 10372 bytes
SHA-256: 813808516e2e93e5b403a2cb20f0a27deabab3d87481f3615aff724365c6fe75

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