Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b9a80ef5da496c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 963733394700cc902877fdce9493d60b SHA-1: 510fcf3254e9b31aedefe85f6a2cb77dedcf307d SHA-256: e1b9a80ef5da496caaae787254adce125739dc8678904b08ff2d6f560590baa7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF file contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or redirect users to malicious sites. One of the primary URLs, https://ttraff.ru/pify?keyword=middle+cerebral+artery+syndrome+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a coordinated effort to distribute malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=middle+cerebral+artery+syndrome+pdf In PDF document text
    • http://files.mgeducation.net/uploads/1/3/1/4/131406391/dorit.pdfIn PDF document text
    • http://files.brooklindanceacademy.com/uploads/1/3/1/8/131871994/ad8f29e6.pdfIn PDF document text
    • http://rovupu.andrekoen.com/uploads/1/3/2/3/132303382/bitawinevajutojaw.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/1/0428/9835/8432/files/gidawibozifuniji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/sujisuxepizejoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/56737423135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/kuvojoxoguxisuroluxazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rorenajufoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/python_csv_dictreader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/kazuo_inamori_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/right_brain_phonics_reading_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/eclipse_car_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/watermark_files_download.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 4

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_off00006690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5548 bytes
SHA-256: f56d7fd0f279653fa3bf4d35e05a8a7d558d42f1a393faecb7bc1eb21371f048
font_01_sfnt_off00007963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 9752 bytes
SHA-256: 2f001c514e75818bb413b7a7605df57ddcb0a0c7e1e294fda9aa7c08201c4703

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