Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aa206b94d595e8…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 22:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a74331933415f86a28f671dfc345262 SHA-1: aa34bba831523ab0ed777d4d0a7da7dc4e4bc53e SHA-256: 90aa206b94d595e85a3c6d6177979b89ce8ade777f657eecc66c72e77eeaaa10
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on Shopify and other domains. One critical heuristic, PDF_MALICIOUS_REDIRECTOR_LINK, flags a link to 'ttraff.ru' which is known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the string 'Integrals of inverse trig' and the URL 'https://ttraff.ru/pify?keyword=integrals+of+inverse+trig', suggesting a lure to disguise the malicious intent. The file is likely used in an SEO spam campaign to drive traffic to malicious sites.

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=integrals+of+inverse+trig In PDF document text
    • http://files.minebricks.com/uploads/1/3/0/9/130969080/ccd188d0ea55.pdfIn PDF document text
    • http://files.biblethought.net/uploads/1/3/1/0/131070940/foxasazi-levesuzozuru-zugomave-kojefur.pdfIn PDF document text
    • http://files.artofeliamariamc.com/uploads/1/3/1/4/131452880/3c0812f859.pdfIn PDF document text
    • http://mowipu.tacvet.com/uploads/1/3/2/7/132741073/delekasodewitedana.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/1/0432/4546/9858/files/el_zorro_astuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/20991367200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0761/1804/files/gathering_blue_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/81105534862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/kanipofekipavelotexub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/suzop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/55164184518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/47153614190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/pixekalanejatepifolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/tegobos.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 5

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_off00005b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 4932 bytes
SHA-256: bb831b6a1b7fee05a2b41c106cca024f282695021ca8a760c1af18583197c65a
font_01_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 13372 bytes
SHA-256: d8b8a4f9734ac53b22636508dacfa6969204bf1a581eadc3f9e0d0b27e97499b

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