Malicious PDF — malware analysis report

Static analysis result for SHA-256 502230a3d7f276bd…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 18:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1387542f541ffba434ae0ba1edb8e8e9 SHA-1: 0924e03065a8ea53a5922f60f5cc774ee69128ab SHA-256: 502230a3d7f276bde62b4924013d95f3da302f6744ded54369039c34d104f389
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL, suggesting a lure to entice users to click the link. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL.

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.ru/pify?keyword=you+are+the+reason+duet+sheet+music+pdf In PDF document text
    • http://lajored.artbymadelinesmith.com/uploads/1/3/1/4/131408899/tiripuvarowubivowas.pdfIn PDF document text
    • http://tesuwivo.fiveonfoxhill.com/uploads/1/3/0/8/130814124/6636709.pdfIn PDF document text
    • http://files.moenkopimemories.org/uploads/1/3/1/0/131070904/vunawimikilipotazo.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/1/0431/1921/4758/files/43005950488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/gapojusabudijekomiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/sefatadiwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/dupusijokinegotesawuleze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/74646595837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/vafogatitoxejibit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/kugiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/assertive_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/88627922402.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 5

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_off000088b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B9 5324 bytes
SHA-256: a543f40b04fa3346c0a37ee403632fae19aa5a3a232912b56c1802ff3434719a
font_01_sfnt_off00009aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAC 15664 bytes
SHA-256: 9302471766f46f85d7b091d82cfb8289cb8f13d3ec5c01602147357a376391af

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