Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6609c7b7416687b…

MALICIOUS

PDF

31.7 KB Created: 2020-08-22 18:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1e3918e9bcf8e83f3aa7d1e2ff2b023 SHA-1: 40b1e03fa066be1dbf724d62541f538523a531fc SHA-256: b6609c7b7416687bc364b009d4c1f2d0a79d8f660cc9b86765830fe1f28b5901
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for sheet music. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent.

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=ebony+and+ivory+piano+sheet+music In PDF document text
    • http://files.sacredstarastrology.com/uploads/1/3/1/4/131437657/816ea.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/1/0440/9124/4696/files/kifiwuvazakorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/rewrite_the_stars_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/sirujibugokosogatorutono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/southern_africa_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4904/8474/files/deool_band_marathi_movie_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4223/2725/files/97315089419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/dekasegenometaxowewabubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/baroxoliwofogobivolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/69776744258.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 1

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_off00003ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF6 5540 bytes
SHA-256: c1f9a1ed2906446e16015063b2e8d942079473ed73176ea05f744eba13ca649e
font_01_sfnt_off000051a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A2 9580 bytes
SHA-256: e098738ac0e8fe7cb60d8af5c2d24048e2683b1c0aabb1d4247ff0d84ab73d40

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