Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a45c8ccbe7b09a8…

MALICIOUS

PDF

36.0 KB Created: 2020-08-22 08:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffa4abe80e2ef5116b8fa9facd6099f3 SHA-1: 68c6a161f17c9a85bfe1d59a513e5dceae314ea5 SHA-256: 8a45c8ccbe7b09a8cb302f0431d1987bab701ab4f5a87eac9e2acf6bb078d02d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links redirects to a known malicious infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is an 'answer key' for 'Bastien piano for adults', which serves as a lure. The presence of a malicious redirector indicates an attempt to lead the user to a compromised site or download further malware.

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=bastien+piano+for+adults+answer+key In PDF document text
    • http://ponurej.twirlyful.net/uploads/1/3/1/0/131070374/faxafo.pdfIn PDF document text
    • http://tinabuful.nickydelariva.com/uploads/1/3/0/9/130969260/mudub.pdfIn PDF document text
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdfIn PDF document text
    • http://files.stillyriveryarns.com/uploads/1/3/0/7/130738712/6066949.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/1/0438/6104/9494/files/zidelot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5698/3192/files/27460012276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9352/3618/files/92824627847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/musivugazogodosolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/86163022293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/dodurewovov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/56599805682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/38473800819.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_off00004e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0B 5344 bytes
SHA-256: 77e7bb55c18b8a3fd4c32d83aa85ff59c3737f82b99b0834fe29a1c8830a9fb6
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 10200 bytes
SHA-256: a8f8322bfb86640d52d04146afa7f4b6c32f4c4ff100a07d58125c9ba5b76773

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