Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f4d5e230a9c079…

MALICIOUS

PDF

37.7 KB Created: 2020-08-18 21:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59c520af5ca4beb5d7f3092dc70d046b SHA-1: 146daad6130d9574ba576b33221a8ac7b49de1b5 SHA-256: 77f4d5e230a9c079eead11e9d5bcc3f7d5c1f619dab3f8ce3541c92c58feadc1
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text that appears to be a lure for sheet music, and the primary redirector URL is also present in the document body. The ML classifier strongly indicates 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.com/pify?keyword=you+are+mine+church+song+sheet+music In PDF document text
    • http://kugigo.deirdreedsign.com/uploads/1/3/0/8/130813528/ponem.pdfIn PDF document text
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdfIn PDF document text
    • http://files.kobefeelingdolls.com/uploads/1/3/1/8/131856956/3bf25a632.pdfIn PDF document text
    • http://files.laedgefilmawards.com/uploads/1/3/1/6/131606065/4827369.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/1/0431/0741/8273/files/printshop_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/9021334326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/flanged_butterfly_valve_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/20567817619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/egyptian_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/albacea_peru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/rome_total_war_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/fedulumid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/16680698192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5666/0633/files/kisutakotoxerunawam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/42454268104.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_off000053a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A1 5140 bytes
SHA-256: c3ae926cebeee8dd83ddf1b7bf577db5f1679f5ff84096ac937ca93ce87ca861
font_01_sfnt_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 10372 bytes
SHA-256: 50c0f297344efb499254bd783656abb868b40959c436957a7d86c014131b6f4b

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