Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8f0cb9273a0c3f…

MALICIOUS

PDF

44.8 KB Created: 2020-08-18 22:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d39139c52e918af6d997985258e9cf7c SHA-1: 3492c12880bf8ffbefc85a47e7a7b25c2d44a1f0 SHA-256: 0a8f0cb9273a0c3ff19209531c127c80a9e92065f7bd9675db1af84720efaab0
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text suggesting it is a 'Dative latin worksheet' and includes the malicious redirector URL. The presence of a large number of external PDF links, many pointing to benign Shopify domains but some to unknown domains, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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.com/pify?keyword=dative+latin+worksheet In PDF document text
    • http://nigegiw.esspreespringers.com/uploads/1/3/0/7/130776046/4280654.pdfIn PDF document text
    • http://kafowoxak.beardsleyzoo.org/uploads/1/3/1/4/131406717/1a154f15.pdfIn PDF document text
    • http://files.msimone.com/uploads/1/3/1/0/131070212/3565284.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/1/0430/5331/8306/files/go_to_sleep_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/26888656497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/basic_english_grammar_book_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/oxford_albanian_english_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/negumelomesisexiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/free_illustrator_t_shirt_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/alteraciones_geneticas_cromosomicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/pdf_pendidikan_agama_islam_kelas_x_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/44464483362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/65421888918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/60472260946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/tabovakupupumamodejasog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/xafanenuzitulajovivajemek.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 7

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_off000070a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A0 4988 bytes
SHA-256: ac7d8e4a78c73e6cab0f89cea4b08982bc331fa10421c0b90c6a6b3a05c45b36
font_01_sfnt_off000081a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A7 10820 bytes
SHA-256: 5b33bd7a728a611e22061796523c694c5a937aa7487698af4f7f8e5e15f9bfec

Open this report in the interactive analyzer, or submit your own file for analysis.