Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cfd45a805a1c66…

MALICIOUS

PDF

49.7 KB Created: 2020-08-09 15:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef2550734baa744280621c629f07eadd SHA-1: 6ebfa0c3d96d85d28216b2ae326e1a0cfa6e0038 SHA-256: b3cfd45a805a1c6600cd1b250b726dc155309e06e69dc091ff16a860fa79cb6e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the target URL and several other PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure. The ML classifier strongly indicated maliciousness.

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=introduction+to+anthropology+psychology+and+sociology+grade+11+textbook+pdf In PDF document text
    • http://files.nicoletiu.com/uploads/1/3/1/4/131483255/0984bdf4c06f286.pdfIn PDF document text
    • http://patikob.carolinewisejourney.com/uploads/1/3/1/4/131407005/gefakovagoko.pdfIn PDF document text
    • http://files.facsglobal.com/uploads/1/3/0/9/130969146/putewesorezikuw.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/1/0436/1850/0765/files/types_of_foundation_in_civil_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/bigawedifatofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/gakevovisaribokaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/lobiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/nazubiselevonajis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/sizaraxajikusif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/anorexia_y_bulimia_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/75314383324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/53040151055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/77134241790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/administrao_por_objetivos.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_off00007fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 5780 bytes
SHA-256: d3c6eb408c087e0c8a8dfaf4108b933d15c6bad02cb8a9b5a9f908b5c880ea1d
font_01_sfnt_off0000939a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939A 11232 bytes
SHA-256: e70d01e7a2c05e2234441371bda83193e897864c6bc3ed3fca1606bf97275b6a

Open this report in the interactive analyzer, or submit your own file for analysis.