Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a32522a42b6d66…

MALICIOUS

PDF

41.6 KB Created: 2020-09-11 20:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15ff364f6ae719994f4a0987c4eef952 SHA-1: 4f009d4967195cda209b204e66ef1181636f0d0c SHA-256: f1a32522a42b6d663cef361e1b3c1694bb78cbb3a585ef9419257ee4b1630c02
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, including one that redirects to a malicious domain. The document body, though heavily obfuscated, contains text related to a piano sheet and a URL that appears to be part of a link farm designed for SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to lead the user to harmful 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.club/wix?keyword=river+flows+in+you+piano+sheet+everyonepiano In PDF document text
    • http://files.rcwarriors.com/uploads/1/3/1/3/131380944/lokupifinovuw.pdfIn PDF document text
    • http://files.herestoreading.com/uploads/1/3/1/3/131378816/xitebovaloz_darotunujidor_wudesiludonuro_vagiru.pdfIn PDF document text
    • http://julisezi.griderproperties.com/uploads/1/3/0/9/130969204/bijuzigimogoso.pdfIn PDF document text
    • http://files.atoalabama.com/uploads/1/3/0/7/130775002/fugola-kosazegi-ketukuliz-vaxaxorib.pdfIn PDF document text
    • http://files.nmsuchristianchallenge.org/uploads/1/3/0/8/130874458/watejomake-vezepufajunuja-gowawib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cece23_d859f93e206e411884d4264e80bb3cd2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/696117_b32cb3a330054060931e54d965a31bad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8ca0f_3968b51ca9db450ab4dcce3a89b8cc14.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc3ca9_d22413fcdb5d43aa91df705be86fc758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/34691500756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/lorobexawawenifenarubek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/47688563551.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_off0000610d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 5252 bytes
SHA-256: 1186aa12f94d78e96d35dd058008a8dde6747d8c743ef102b0836cdce20c2c71
font_01_sfnt_off00007308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7308 12760 bytes
SHA-256: b18cabb39a1320d4c4f226d0a6111a251189be895317ffaf12f76bbf03033240

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