Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5cbaadf68dcf18…

MALICIOUS

PDF

33.6 KB Created: 2020-08-20 04:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d9b40e3f64e5d1ef2a8149b8066b2ca SHA-1: d3ed47dc560e59bf2cd6b12fa821e0af7281d329 SHA-256: aa5cbaadf68dcf18ac0330fbe6860e75713e00452463c12b94f1a6c8743486c2
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=abc+song+sheet+music+piano, which is also listed as a malicious redirector. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to manipulate search engine results and distribute 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.ru/pify?keyword=abc+song+sheet+music+piano In PDF document text
    • http://files.heavenonearthestates.com/uploads/1/3/0/7/130775232/zitan.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/1/0437/0730/2037/files/unix_kill_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/94804939218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/principles_of_biochemistry_lehninger_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8069/5462/files/gogimanivanitejulonup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/17992356533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/4952767027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/unconfirmed_report_means_in_ecg.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 2

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_off000043e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43E8 5348 bytes
SHA-256: dfcd41194fb485fdcd6dbc4aa13cb8bc99cfa0ef992567b306f77645571b1d56
font_01_sfnt_off000055ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EA 10608 bytes
SHA-256: 99d81f7f451d2e71c0689072ffafee6007d563b2b1707d1eec70c1fdc0637742

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