Malicious PDF — malware analysis report

Static analysis result for SHA-256 8033ac1e828ff22e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 20:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2dc1e9bb11bb3dd834550a9f6f58045 SHA-1: 4d51da8fb41fb4b4b82024f23797529ee41135f6 SHA-256: 8033ac1e828ff22e50fc62e0ea1857c5b3606f68dabbe4c3e0ea4f2a9d46e7f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as free sheet music. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics identified malicious redirector links. The document body contains the lure text and embedded URLs, suggesting the primary goal is to redirect the user to malicious content.

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=beatles+guitar+sheet+music+free+pdf In PDF document text
    • http://files.nodaysoffalthletics.com/uploads/1/3/1/1/131164122/3225b1fc94.pdfIn PDF document text
    • http://files.lairdnorton.org/uploads/1/3/0/9/130969598/02ead7e.pdfIn PDF document text
    • http://files.patrickinpanama.co.uk/uploads/1/3/2/6/132696274/jijanowavuxo.pdfIn PDF document text
    • http://files.recreationlifestylehealth.com/uploads/1/3/0/7/130776241/mebeb.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/1/0434/6170/5890/files/anormalidades_del_cordon_umbilical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/70850456188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/85500341758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/66769845736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/jexepeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/dasiwemuzunabavivibinaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/what_is_the_storage_form_of_glucose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/sudujabebavududi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/sawakipelapejowelug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/navigator_dagger_ffxiv_arr.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_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5616 bytes
SHA-256: 559b7aebc2e9a8af1c6de620137fbb61570a2385e6889ec4d72279444ac90297
font_01_sfnt_off0000770a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10412 bytes
SHA-256: 1827b0bd5a438fc690561cdbcbde18cce5f6a5bb8fb67495bb18a3b4cf482dab

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